A long-awaited trip with her family to a ski resort turns into a real nightmare for Olga Krasinskaya. Lost in the twilight in the mountains, she accidentally finds herself in a cave, where she finds a terrible collection - seven corpses encased in ice. Not remembering herself, Olga runs out of the cave. But her story is perceived as the ravings of a madwoman. A few days later, Olga's father was killed in a hotel room. And she is the prime suspect. Nobody believes in her innocence, not even close people. She does not believe herself. What is it: the action of a lunatic or a well-planned criminal plan? This is exactly what the head of the security of the Pal Palych Zvyagintsev resort will have to figure out ...