Prologue
The lake slept. It had slept for hundreds of years. Its water lay still and dark beneath the sky of the Lüneburg Heath. The oaks along its banks had watched generations of people come and go. Fishermen had cast their nets. Children had played at the shore. Old women had drawn water there while singing songs whose words had long since been forgotten.
But the lake forgot nothing.
Deep beneath the earth, under layers of clay and sand and stone, they lay waiting. Nine fragments of a secret older than the village, older than the oaks, older than the first people in this region. They were small. Some as large as a hen’s egg, some smaller. Their surface was smooth and cool. And they glowed. A faint, cold light that nobody saw, because nobody dug deep enough. Because nobody asked the right questions. Because nobody was ready.
The light stones waited.
They waited patiently. They were good at that. Time meant nothing to them. For them a century was like a single breath. They had waited when the heath was still primeval forest. They had waited when the first settlers came and built their huts. They had waited while wars swept across the land and disappeared again. They were still waiting.
But something changed.
It was an autumn evening. The sun stood low. Golden light fell slantwise across Räber-Springsee and bathed everything in warm colours. Three children came down the path toward the shore. Two girls and a boy. No, one girl and two boys. The girl carried a backpack and held a notebook in her hand. The older boy ran ahead, impatient and full of energy. The younger boy followed more slowly, more cautiously, with eyes that noticed everything.
The light stones sensed them. For the first time in a very long time, they sensed something. A tingling. An awakening. A possibility.
Beneath the old oak on the western shore, thirty centimetres below the surface, one of the stones began to shine more brightly. Not much. Just a little. But it was enough. Enough to be found. Enough to change everything.
The lake awoke.
And with it awoke a story that had been waiting for centuries to be told. A story about three friends who possessed more courage than they knew. About an old fisherman who finally understood why his grandfather had spoken to him of shining stones. About a village that carried a secret inside itself without knowing it.
This is the beginning of that story.
It begins on an afternoon in October. At the shore of a still lake. With a spade, a magnifying glass and the curiosity of three children who never stopped asking questions.
Because that is what sets adventures in motion. Not strength. Not magic. But the simple, courageous question: What is this?
Chapter 1: The Glowing Fragment at the Lakeshore
The afternoon smelled of fallen leaves and damp earth. Leni stood at the shore of Räber-Springsee and adjusted her backpack higher on her shoulders. The old oak tree cast long shadows across the grass. The water of the lake lay still and dark. No wind disturbed its surface. Leni loved this quietness. Out here, she didn't have to think about school, not about the math test on Friday, not about the argument with her mother over tidying her room. Here she was simply Leni. Eleven years old, curious about everything, and usually the first one at their meeting spot. Behind her something rustled, and Finn came tumbling down the path. His shoes were already muddy. A leaf was stuck to his jacket. "You're late," said Leni. Finn shrugged. "My mother wanted to know where I was going. And whether I had a hat with me. And whether I'd be back before dinner." He sighed. "You know how she is." Leni knew Finn's mother. She worried. Always and about everything. Arvid was already sitting on a thick root of the oak tree, flicking little sticks into the water. He was wearing his favorite jacket, the green one with all the pockets. "Finally, you're both here," he called impatiently. "I've been waiting forever." "Five minutes," Leni corrected him. "Feels like forever." Arvid jumped up and brushed off his pants. "So, what are we doing today?" Leni pulled out her notebook. "Today we dig."
Arvid was immediately enthusiastic. "Digging! Finally something real!" He dragged out a small garden spade from his backpack and held it triumphantly in the air. Finn studied the spade with a wrinkled forehead. "Are you allowed to dig here? This is nature." Leni nodded reassuringly. "The shore isn't a nature reserve. I checked. The municipal map lists this area as recreational land." Finn relaxed a little. Leni pointed to a spot directly under the oak, where the earth looked dark and loose. "There. It rained yesterday. The soil is soft. Perfect for digging." Arvid rushed off before Leni finished her sentence. The spade drove into the ground. Earth flew backward. Finn jumped back. "Hey, watch it! That's landing on my jacket!" Arvid grinned broadly. "If you dig, you get dirty. That's a law of nature." Leni knelt down beside the digging site and sorted through what Arvid unearthed. An old root, thin and hardened. Three round, smooth stones. A shell, gray and crumbling, probably hundreds of years old. Leni arranged everything neatly on a flat spot. Finn crouched beside her. He didn't dare dig himself, but he watched everything with sharp eyes. That was Finn's strength. He saw things others missed. Small changes. Tiny details. "There's something else," he said suddenly, pointing to a spot to the right of Arvid's spade. "Something light. Under the dark earth." Arvid wiped his hand over the area. "Where? I don't see anything." "A bit deeper," said Finn quietly. "Keep digging there."
Arvid dug deeper. Ten centimeters. Twenty. Thirty. The earth grew darker, damper, denser. Leni noted the depth in her notebook. Finn held his breath. And then the spade struck something solid. Not hard like an ordinary stone. Different. Softer in resistance, but firm. A dull sound that didn't sound like earth or wood. Arvid set aside the spade and scraped away the earth with his bare fingers. His fingernails pushed brown clay aside. Slowly an object came into view. It was about the size of a chicken egg, but irregularly shaped. Not round, not angular. More like a drop that had been turned to stone. The surface felt smooth. Much smoother than any other stone from the ground. Almost like glass, but warmer. "What is that?" whispered Finn. He'd moved closer, though his whole body was tense. Arvid lifted the stone carefully and laid it on his open palm. It felt heavy there, heavier than expected for its size. And then it happened. The sun was approaching the horizon. The golden light around them grew weaker. Shadows crept across the ground. And the stone began to glow. It was a cold, blue light. Faint at first, like the glow of a dying candle. Then clearer, more distinct. It wasn't coming from the surface. It wasn't a reflection of the sun. It came from inside. From the heart of the stone. Finn stumbled backward. "That's not normal," he stammered. His voice was thin. Arvid stared at the stone. His eyes were huge. "That's magic," he breathed. Leni took the stone carefully from his hand. "That's not magic," she said firmly. "That's phosphorescence. Or bioluminescence. Something scientific." But her voice trembled. Because she was lying. She didn't know what it was.
Leni examined the stone with the thoroughness of a true researcher. She held it up to the last sun on the horizon. The glow grew weaker. She turned around and held it in the deep shadows under the oak. The glow became stronger. Cold blue, steady, calm. No flickering, no pulsing. Just light. "Fascinating," she murmured. She slowly turned the stone in her hands. The surface wasn't completely smooth, she realized now. In some places there were tiny grooves. Almost like a pattern, but too fine to see with the naked eye. Leni pulled out her magnifying glass from her backpack. Finn and Arvid exchanged looks. Arvid rolled his eyes. Typical Leni. Who brought a magnifying glass to play? Leni brought a magnifying glass. And a notebook. And a compass. "The structure is crystalline," said Leni, more to herself than to the others. "But not any crystal I know. Quartz looks different. Feldspar too." She compared the light stone to the normal stones beside her. Gray, dull, lifeless, cold. This one was different. Completely different. "It's warm," Leni said in surprise. She set it briefly on the ground and picked it up again. "Even though it lay in cold earth, thirty centimeters deep, it's warm. That makes no sense." Finn rubbed his arms nervously. "I'm cold," he said. But he didn't mean the weather. "This is real," said Leni finally. She looked up from the stone and met Finn's and Arvid's eyes directly. In her eyes was confusion. "This isn't normal. And honestly, I don't know what it is." This was the first time Finn had ever seen Leni so uncertain. Leni, who always had an answer. Leni, who could look anything up. And that frightened him more than the glowing stone itself.
The three stood in the half-light under the oak. The stone glowed gently in Leni's hands. The sun had disappeared. On the horizon, a narrow strip of orange glowed. "What do we do now?" asked Finn. Arvid took a step forward. "We show everyone! My parents, the teachers, the mayor! Their jaws will drop!" Leni shook her head decidedly. "No. Not yet." Arvid frowned. "Why not? This is the greatest discovery of all time! Or at least the greatest one in Räber." "Exactly because of that," said Leni calmly. "Think about it. If we show it to the adults, what happens? They take it away from us. Right away. They'll say they have to send it to the lab. Or to the university. And then we'll never see it again." Arvid opened his mouth. Closed it again. He wanted to argue, but he found no counterargument. Because Leni was right. That's how things went. Children found something, adults took it away from them. For their own good, of course. Always for their own good. Finn stood between them and looked out at the lake. The water was black now. The first stars showed themselves in the sky. "That's a secret, isn't it?" he said quietly. Leni and Arvid turned toward him. Finn looked vulnerable in the dusk. Small and thin. But his eyes were firm. Determined. "Yes," said Leni. "It's our secret." Arvid nodded slowly. "Our secret." They stretched out their hands. Three hands on top of each other. A promise without words. Between their fingers the stone glowed. And in that moment, they felt something that none of them could have named. A connection. A bond, invisible and strong. None of them spoke. But all three felt it. Something had changed. Not just out at the lake. Also within themselves. They were no longer ordinary children playing at the shore. They were guardians of a secret. And that was both exciting and frightening.
The questions came like raindrops, first scattered, then all at once. They settled beside each other on the oak's roots, the glowing stone in their center. Darkness had settled over the lake. In the distance, a dog barked. The smell of wet leaves surrounded them. "Where does the stone come from?" asked Leni. "How old is it? What kind of material is it?" "Who buried it here?" wondered Arvid. "Is it a treasure? Did someone hide it on purpose?" "Is it dangerous?" wanted to know Finn. His voice was barely more than a whisper. "Can it hurt us somehow?" The stone glowed on. Steady, patient. It offered no answers. "We need help," said Leni after a while. "Someone who knows about things like this. Someone we can trust." "And someone who won't think we're crazy," added Finn. Arvid snapped his fingers. "Gunnar!" Finn nodded immediately. "Yes. Gunnar." The old fisherman. He knew the lake better than any other person in the area. He'd lived for decades in his cottage on the north shore. He knew things about the landscape that weren't in any book. And most importantly: he never asked stupid questions. "Then let's go now," said Arvid and jumped up. Leni hesitated. "It's getting dark, Arvid. We have to go through the forest." "So what?" Arvid grinned. "We have a glowing stone. That's better than any flashlight." Even Finn had to smile. "He's right," said Finn quietly. "The stone gives off enough light." Leni carefully placed the stone in her jacket pocket. The blue light shimmered through the fabric, muffled, but visible.
The path to Gunnar's cottage led along the shore and then through a stretch of forest. Two kilometers, maybe a bit more. Normally they needed twenty minutes. Leni knew the way by heart. She'd walked it a hundred times. But never in darkness. And never with a glowing stone in her pocket. Everything was different today. The familiar landscape had transformed. What looked harmless and beautiful during the day became mysterious and strange at night. But in the darkness everything moved slower. The twilight had turned into genuine night. The beech trees stood like dark pillars on either side of the path. Between the trunks hung fine mist, thin and gray. The forest floor was damp and soft beneath their shoes. Arvid went first. His step was quick and sure, as always. He had no fear of the forest. Leni followed him, the stone in her pocket, casting a gentle glow on the path. Finn brought up the rear. His steps were smaller, more cautious. At every crack of a twig he flinched. An owl called in the distance. Its cry echoed between the trunks. Once something rustled in the bushes, loud and sudden, and Finn stopped abruptly. His heart pounded. "What was that?" "A rabbit," said Arvid, without turning around. "Or a hedgehog. Or a squirrel." "How do you know that?" "Because it was too small to be a monster." Finn didn't find that funny. "Please stop being so quiet," he asked. "It makes it worse. When you're talking, I can't hear the other sounds." Leni laughed softly. "So we should talk so you won't hear the sounds?" "Exactly." So Arvid told him about a film he'd watched over the weekend. Something with pirates and sunken treasure. Finn listened and forgot about the dark forest for a few minutes. Leni walked silently between the two and thought. What was this stone? Where did it come from? And why did it glow? Questions upon questions, and not a single answer. The forest opened up a bit. Moonlight fell through the tree crowns. And between the trunks, at the end of the path, warm yellow windows glowed. Gunnar's cottage.
The cottage emerged from among the trees like an old promise. It was built from dark wood, with a roof of shingles that wind and rain had turned gray over the years. Moss grew on the walls. A stack of firewood leaned against the side, carefully stacked. In front of the door stood a pair of rubber boots that were probably older than Leni. Smoke rose from the chimney into the night sky. The windows glowed warm and inviting. In front of the door sat Gunnar on a bench, mending a fishing net. He was tall and broad-shouldered, with white hair that fell to his shoulders, and hands that looked like old, tanned leather. Seventy years old, at least. His face was weathered, furrowed with deep lines that told of wind and sun and countless hours on the lake. But his eyes were awake and clear. Light gray eyes that saw everything. Very awake. When the children emerged from the forest, he looked up. He said nothing. He set aside the needle and looked at them. One after another. Arvid, who shifted excitedly from one foot to the other. Leni, whose jacket pocket glowed strangely. Finn, who hid behind Leni. Then Gunnar looked at Leni's hand as it reached into her pocket. She pulled the stone halfway out. The blue light fell on Gunnar's face and cast shadows in his deep wrinkles. His eyes widened. Just for a moment. Then his gaze became calm. Controlled. "Come inside," he said. His voice was deep and warm. Not surprised. Not frightened. But not indifferent either. He stood up, slowly and deliberately, laid the net over the bench, and opened the wooden door. Heat streamed out. It smelled of wood fire, of tea, and of the herbs Gunnar dried from the ceiling. The children stepped inside. Finn breathed out. Here it was safe. Here was Gunnar. And Gunnar would know what to do. Or at least he would ask the right questions.
Inside the cottage it was warm and still. The fire crackled in the cast-iron stove. Old furniture stood against the walls, worn but well cared for. Pictures of boats and lakes hung above a shelf full of books. The children sat down side by side on the bench by the stove. Finn pressed himself against Leni's side. Arvid sat on the edge, legs dangling, fingers drumming on the wood. They exchanged glances. Should they really show him? They'd just sworn to keep it secret. And now they wanted to tell the first adult they met? "He's different," Arvid whispered barely audibly. "Gunnar isn't like the others." Leni bit her lip. Finn stared at his shoetips. "We said no one," he muttered. "But Gunnar isn't no one," said Arvid. "Gunnar is... Gunnar." That was true. Gunnar was different from other adults. He never said "You're imagining that" or "Children shouldn't ask so many questions." He took them seriously. Always. Leni breathed in deeply. Held her breath. Let it out slowly. Then she nodded. "Let's show him." Finn looked up. Fear still stood in his eyes. But something else too. Relief. It was good not to be alone with the secret. They needed someone who knew more. Someone who could ask the right questions. Gunnar sat down in his old leather armchair across from them. He folded his hands and waited. Patiently. Without pushing. That was Gunnar. He waited until people came to him. He never pushed. He never asked first. He waited, and when the time was right, the words opened of their own accord.
Leni took the stone from her pocket. Her fingers trembled slightly. Not from cold. From excitement. From the importance of this moment. She laid the stone on the table. The blue light spread across the dark wood. Shadows danced on the walls of the cottage. The crackling of the fire seemed to grow quieter, as if it had respect. Gunnar bent forward. Slowly. He stretched out his gnarled hands and took the stone. Carefully, gently, as if it were something alive that could break. He turned it in his hands. Held it to the light of the fire. Held it in the darkness. His face changed. The wrinkles became deeper. Something pulled at the corners of his mouth. His eyes became serious. Very serious. For a long time he said nothing. The children held their breath. Arvid clenched his fists in impatience. Finn pressed his lips together. Leni watched Gunnar's face like a scientist observing an experiment. What was the old man seeing? What did he know? Then Gunnar slowly settled back in his armchair. He laid the stone carefully on the table. The blue light continued glowing, patient, unshakeable. "This is real," said Gunnar quietly. "This is not normal." "That's what I said too," murmured Leni. "Where did you find it? Exactly?" Leni described the spot. Under the old oak on the west shore. Thirty centimeters deep. Damp, dark earth. Gunnar listened. To every single word. His eyes didn't release Leni. "You don't know what you've found, do you?" he said finally. The children shook their heads. Gunnar looked toward the window. Outside it was pitch black. Only the moon cast silver light on the lake. Then he looked at the children. In his gaze lay something Finn couldn't place. Wonder. Or awe. Or perhaps something completely different. "There are stories," said Gunnar slowly. "Old stories. Stories my grandfather told me. I always thought they were just that. Stories." He stood up and went to the shelf on the wall. His hand slid along the book spines. "But now," he said, "I'm not so sure." And he pulled out a black notebook. The pages were yellowed. The cover worn, the corners bent. It looked a hundred years old. Dust swirled up as Gunnar opened it. The children leaned forward. They could make out handwritten lines, faded ink on brittle paper. And on one of the pages – a drawing. A stone. A glowing stone. Finn reached for Leni's arm. "That looks like ours," he whispered. Gunnar nodded slowly. "Yes," he said. "That looks exactly like it." He closed the book again and held it against his chest. "Tomorrow," he said. "Tomorrow I'll tell you more. Tonight it's late, and your parents are waiting." The children didn't protest. They were too exhausted, too overwhelmed. Leni placed the stone back in her pocket. It was warm. Warmer than before. As they left the cottage, Finn turned back once more. Gunnar stood in the doorway, the notebook in his hands. He looked old in that moment. Old and thoughtful. And somehow also relieved. As if he had been waiting a long time for this evening.