August nights in the far north are short, full of purple mists and cool breezes from the lake. Lena has never liked living here - she has always felt that she is surrounded by something she cannot put into words. Her eighteenth birthday was just around the corner, and she was still that girl from the end of Polar Street, known for preferring to read old books rather than party, and for talking to birds as if they were people. This year something was different. Since returning from her holiday, Lena had noticed that the light from the lamppost behind her house had changed colour - instead of a yellow glow, there was a cool, almost icy light oozing from it, which attracted huge moths at night and.... something else. Some kind of shadow, always on the edge of her field of vision, behind one of the frosted pillars. Her brother, Marek, treated these sightings as another of his sister's whims. - 'Stop it, Lena,' he said, rolling his eyes. - 'It's definitely someone from our class playing a prank before the new school year. But Lena knew he wasn't wrong. Especially after what happened in the middle of the night, a few days ago. She was awakened by a tapping on the window, as if a stone had hit the glass. She rose from her bed and immediately noticed a strange glow in the yard - just like an aurora, only spilling smoothly over the grass and trees. For a second, she had the impression that the world outside had acquired new, unfamiliar colours. The next day, Lena couldn't stop thinking about the phenomenon. She went to the library, trying to find out more. She found nothing in the books about the aurora borealis, but the elderly librarian, Mrs Borys, looked at her with seriousness and said in a whisper: - Don't walk alone when the lights are changing. This warning only increased her curiosity. As evening fell, Lena waited until everyone in the house was asleep. She grabbed her torch, her old shoes and her camera. She crossed the creaky porch, slipped down the path behind the house and stood under the lantern, whose cold light shone among the damp grasses. In the distance she could see blurred shadows, as if someone had passed just beyond the tree line. Then she heard a quiet whisper. She wasn't sure if it was the wind or a voice. The camera trembled in her hand. She took a step forward, her heart pounding like mad, and at the edge of the light she saw a blurred silhouette - too tall, too unreal to belong to a human being. Suddenly the ground beneath her feet began to pulsate, and the air became thick with light and colour. She wanted to turn back, but something was drawing her closer and closer to the source of this strange glow. At that moment, Lena could not have guessed that in a moment she would discover a passage to a place where light has a will of its own and reality deforms according to completely different rules....