The school year was just coming to an end when Piotr, Anka, Martyna and Kuba received an unusual offer from their biology professor: to take part in a scientific expedition to an old, now defunct research station in the far north of Norway. It almost sounded like a dream come true - not only a trip abroad, but also an opportunity to gain experience that could help them in their future studies. None of them expected how much this trip would change their lives. The Svalbard 7 research station was hundreds of kilometres from the nearest settlement, hidden in a hard-to-reach valley just above a frozen fjord. They stepped out of the helicopter with their souls on their shoulders - snow underfoot, white all around and silence interrupted only by the creaking of their own boots. The frozen buildings looked like they had been abandoned in a hurry. There was a faint smell of old metal and damp walls in the air. On the very first evening, while unpacking the equipment, Peter noticed that one of the led lights was constantly flashing, although the bulb was new. "Maybe it's a matter of the wires, they must have frozen," muttered Martina. Anka laughed that they should be used to strange sounds and malfunctions at the end of the world, especially in a place where no humans had appeared for six months. For two days everything went almost perfectly, although the dark blue nights of the Arctic and the strange noises from behind the walls kept them awake. Kuba - who had the strongest imagination of the four - joked that the place was straight up a horror movie, to which Peter just rolled his eyes. One night, however, they heard something that could not be easily explained. It was almost two in the morning. A cold wind was rustling the walls and snow was rumbling against the kitchen window. Suddenly, a deafening bang came from deep in the corridor. Peter's lamp danced on the table and a shadow appeared on the wall, moving unnaturally fast. From the darkness of the corridor came a quiet, dragging sound, akin to the clinking or scuffing of metal against metal. Martina turned pale, Anka froze with a mug of tea in her hand. Kuba looked at Peter, seeking confirmation that this was really happening. Peter only nodded towards the door leading to the back room. "We need to check it out," he whispered, although he wasn't sure of it himself. They walked out into the corridor, each with a headlamp on his head. The air was icy and the walls, covered in a thin layer of ice, glistened in their lights. There was a trail on the floor, as if someone had dragged a heavy, wet cord. The trail led to an old laboratory, whose door should have been locked - yet was flung wide open. Cuba was the first to lean inside. Inside was complete darkness, and from deep inside the room there was a rustle, as if something was breathing ... or simply waiting for the next move.