Lena, Michael, and Kacper slip into an abandoned waterfront warehouse and find a hidden passage beneath the old port, where strange marks, cold air, and fresh footprints suggest they are not alone.
The evening heat hung over Old Harbour Town like a wet cloth, softening the edges of the narrow streets and making every shadow seem deeper than it should have been. Lena, Michael, and Kacper moved through the side alleys with flashlights in hand, their footsteps quick and quiet. By day the harbour was loud with tourists and gulls and music from the cafés along the water. After sunset, it changed. The place emptied out and seemed to wait, as if it were holding its breath.
They had spent most of the afternoon watching the old warehouse on the waterfront, the one with the warped door and the rusted sign that warned people to stay out. It had been abandoned so long that even the seagulls seemed to avoid it. That only made it more interesting.
"I saw something in there last night," Michael said, lowering his voice as they reached the dock. He glanced at the others, a grin tugging at one corner of his mouth. "Between the crates. I’m not saying it was anything important. Just... something moved."
"Probably a rat," Lena said at once, though she was already smiling. She lifted her flashlight and swept the beam across the warehouse wall. "Still, if there’s anything worth finding, it’s going to be behind that door."
Kacper said nothing. He had been the one trying to talk them out of it on the way here, and he still looked unconvinced, but curiosity had a way of wearing down caution. He stepped forward, set his shoulder against the warped planks, and pushed.
The door gave way with a harsh screech and a crack of splintering wood. The sound rolled through the warehouse and came back to them in a hollow echo.
Inside, the air was damp and stale, heavy with salt, mildew, and old timber. Their flashlights moved over stacked barrels, leaning crates, and torn sacks that had once held grain or coal or something just as forgotten. Dust floated through the beams of light like ash. Lena walked to the nearest crate and ran her fingers over the lid. There, cut deep into the wood, was a mark none of them had seen before: a lighthouse, drawn in a sharp, simple line, with a flame hidden inside its tower.
"Look at this," she said.
Michael crouched beside her, narrowing his eyes. "That wasn’t made by accident."
Before anyone could answer, a sound drifted up from somewhere under the floorboards. It was soft at first, then unmistakable: water moving in the dark, as if a channel or underground stream ran directly beneath their feet.
Kacper frowned. "There shouldn’t be any water here."
Then another noise reached them, quieter but stranger. A slow scrape, like something shifting along stone.
They turned toward the far corner of the warehouse, where a half-hidden wooden door had been wedged behind a stack of crates. It stood slightly open. Cold air breathed through the gap, carrying the smell of the sea and something older, metallic, almost burned.
Michael knelt and touched the edge of the door. "Shall we?"
Lena tightened her grip on the flashlight. She could feel her pulse in her throat, but she nodded.
The door opened onto a narrow stone corridor sloping down beneath the harbour. Their footsteps rang out sharply, then faded into the damp hush around them. Pipes ran along the walls, corroded and sweating, and in places the floor glistened with shallow puddles that reflected their wavering light. Far ahead, a pale glow pulsed once, then again, faint as a signal.
They moved toward it in silence until Lena stopped so suddenly that Michael almost walked into her.
In the middle of the corridor, fresh footprints marked the wet stone.
They were not theirs.
The three friends drew closer together, listening to the quick, uneven sound of one another’s breathing as the pale light ahead shifted once more, as if something down there had just noticed them too.