Evenings at Crane Marsh always smelled of smoke from distant campfires and the sweet dampness of the moors. The landscape was as flat as a breath before sleep: rust-coloured reeds rippled in the cool wind, and a heavy, chocolate cloud hung above. Somewhere beyond the line of alders the last rays of the sun were fading, spilling orange stripes across the water, as if someone had scratched the surface of a mirror with a knife. Nina adjusted her cap so that it didn't slide down over her eyes. She was fourteen, with a calm smile and hands that always smelled of conifer - from the camera box she had sanded with her own hands over the summer. Now the box rocked on her belt, and inside lay her old but reliable camera with a telephoto lens. Next to it, in her rucksack, a small dictaphone, the same one she had used to record the singing of a piping plover for a school project, was crunching. - Can you hear it? - Olek, a year older and a head taller, stopped on a wooden platform that bit into the reeds like a tongue. Nina stopped. For a moment, all they heard was the splash of water somewhere under the planks. And then - a sound. Seemingly nothing more than a single, deep trumpeting sound, the kind made by cranes at their evening rally. But it was immediately followed by a second sound, a lower, dragging sound, and then two quick ones: short, short. An arrangement that repeated itself once, a second, a third, with a precision that no one would expect from birds. - 'It's no coincidence,' muttered Nina and pressed the recorder button. The blue LED lit up quietly like a star covered with a handkerchief. For the next week they would come back here, ostensibly to the Bird Rehabilitation Centre, where they would sometimes help feed the jay chicks or turn over the greening thatch of herbs on the drying shed, but really - to the pier. They discovered that the cranes gather at a fixed time, as if someone had put a dot on the calendar. They discovered that their calls sometimes form repetitive sequences and that these sequences fit like keys to a map. Olek drew reeds on a piece of paper, clump marks, vole paths like silver threads, and then marked the places where the repetitions of sounds came from. They formed an arc, and this arc ran straight towards the northern edge of the reserve, where the old decayed footbridge, closed to tourists for years, began. - 'Are you saying they're showing us the way? - Nina asked, dragging her finger across the map. - 'Not to us. Just someone - Olek corrected her and turned the sheet of paper over. On the back he wrote the time and date as he always did: Tuesday, 6:32 p.m. - But if someone had the ears to understand it, they would go there. The next evening the air was thick as syrup. The fog carried low, coating shoes, hair and tongue. On the information board at the entrance to the reserve, the drops were arranged in wispy letters. "Caution, wetland." Seemingly nothing new, yet the same sign sounded sharper today. - Do you have a headlamp? - asked Nina, although she could see that Olek had long worn it on his cap like a question mark. - I do. But I prefer not to shine it. - He shrugged his shoulders. - If there's actually something going on here, the light will only spoil everything. "Something" was one of those words with too much behind it: foreign clues, shadows and that neck tingle they cause, which assaults you when you go where you don't normally push your nose. Nina was feeling that tingle now. Nonetheless, she placed her feet lightly and confidently, counting the planks in her mind: three short, two long, a hop across the gap where a pair of moor frogs nested in spring. The first they saw was a crow. It was sitting on a post like a black exclamation mark, twisting its head as if it had turned it completely. It had something brilliant in its beak, and when Nina picked up the binoculars, it blinked at her calmly and dropped the object straight onto the boards. It was a metal ornithological ring with a number stamped on it, one digit different from the ring Nina had put on the young stork at the Centre a week ago. Almost the same, but not the same. The crow spread its wings and flew away silently, as if the air was as soft as an owl's. - 'Look,' whispered Olek. - Again. Drops of mist were now settling so thickly on the reeds that the plants looked as if someone had sprinkled them with salt. A few pairs of grey silhouettes moved among them. The cranes were not dancing. They were not vocalising merrily, as they do on those mornings in early spring when they practise hopping and bowing. They stood in a semicircle, heads bowed low, and occasionally, from time to time, one of them would make a deep tone. Then another, with a slightly lower pitch. Then two short ones. The arrangement repeated like an echo, but each series came from a different place, moving like a luminous point across the dark screen. - 'They're leading us,' said Nina, not sure whether she was talking about the birds or the whole swamp. They moved on. The footbridge creaked as quietly as if it was trying not to disturb them. On the other side, where the usual route turned to a viewpoint with a sign about migrating geese, the footbridge ran straight north towards the forbidden part of the reserve. The wooden cross that was supposed to symbolise 'do not enter' was stuck crooked and bleached with sun salt, like a tombstone of old customs. - 'You know we could get in trouble for this,' muttered Olek, but he didn't turn back. - 'I know,' Nina squeezed the recorder in her jacket pocket. - 'But if there's something here, someone who loves animals had better be the first to see it. They walked a few dozen metres more until the planks ended abruptly, broken by winter water. Where the footbridge ended, the land began - lighter, but still soaked, as if one stood too long, one's boots would slowly start to soak in. The reeds grew quiet, as if someone had pressed the pause button on the whole world. Only occasionally a heavy breath slid across the distant surface - not wind, not water. Something third. - Can you hear it? - Olek stopped Nina and wordlessly pointed a finger at the ground. A shape was imprinted in the mud. It was fresh, springy, with clear finger outlines. A fox. But next to it, barely a touch, as if imprinted with an inkless pen, there was a line, zigzagging from one edge of the clump to the other. A pen dragged along the ground. As if someone was waving it around, taking notes. - 'It's just like on your paper,' Nina said quietly. - Arc. A silhouette slid out of the mist. A fox, red as a lit brick, walked along the pen line, carrying a scrap of blue tape in its mouth. He stopped a few paces away from them and laid the tape on the ground. He did not run away. Instead, he sat down and crooked his head as if listening in their direction. There was no fear in his gaze. There was attention. Nina knelt down, even though she knew she shouldn't. The tape the fox had brought was a rescue tag from the Centre. At the end were two letters: "NR" - the initials of the biology teacher, Mr Norbert Rylski, who had been fighting for months for extra grants to feed injured birds. This piece of tape belonged to the stork that disappeared with the transmitter on Thursday, exactly that afternoon, when the first mismatched sound arrived on the platform. - They are really leading us," whispered Nina. She stood up carefully. The cranes in the reeds did the sequence again: one, two, two fast. As if they were confirming. - 'I mean...' - Olek paused in mid-sentence as the mist on the right moved in layers, the way a curtain moves when someone walks past it without touching it. Something large muscled the air, but there were no wings. There were no footsteps either, no twig snap. Just that heavy, even breathing. The water next to the clump suddenly trembled. Not a ripple, but a pulsation, as if something beneath the surface tapped once, twice, three times - as if in response to a signal. The cranes immediately fell silent. The fox pricked up his ears so high that they almost touched his neck. Olek tightened his hand on the strap of the torch, but it still did not shine. Nina felt the air pressure around them suddenly change, like just before a storm. - Is that water? - Olek asked, but it wasn't water. A shadow came out of the reeds, no bigger than a man, but denser than anything they had seen so far. In the seconds that followed, more silhouettes appeared, low and slender, some with tails, others with soft ears, all moving with the certainty of organisms that know every hair of this earth. A badger stopped just at the edge of a clump, a hedgehog stood on its front paws, ripping up the grass with spikes like fingers, and above on the aspens silent shadows came to life - owls, two, three, with eyes like amber. The animals stopped in a semicircle in front of Nina and Olek, just as the cranes had done earlier. For a moment there was such silence that you could count your own heartbeats. And then, from the deepest edge of the reeds, there was a sound that did not fit into any category Olek had in his head: it was not a bark, not a murmur, not a murmur. It was a tone, low and clear, like the first sound made by a new instrument - and it carried something that every spine understood immediately. Fox got up and walked closer, a step, another step, until he carefully touched his nose to Nina's shoe. Warm breath settled on her ankle, and she had the feeling that they were standing on the edge of a circle that must not be crossed without invitation. Suddenly, the owls lifted their wings at exactly the same moment, as if someone had pulled a common thread. The cranes, invisible in the mist, called out again in a sequence: one, two, two fast - after which the world dimmed for a second, for less than a blink, as if someone had covered it with a hand. - 'Don't take a step,' said Olek almost silently. At that moment something large, far too large for the swamp animals they knew, pushed the reed away. And before they had time to think anything, eyes flashed in the narrow strip between the clumps - not reflecting light, because they weren't shining a torch, but their own, dark, deep, as if a slow embers were burning inside. Something extended a paw over the dry edge. The shape was elegant, familiar and yet different. Nina swallowed her saliva and, before it really occurred to her what she was doing, she raised the recorder slowly to capture the sound that was just growing. The fox at her side did not escape. The badger took half a step back, as if making room. Olek tightened his fingers on the torch strap so hard that his knuckles turned white. The world held its breath as what was emerging from the reeds took its first full step onto dry land.