The life paths of school friends Natalya, Lina and Victoria diverged, their destinies also turned out differently. But one chilly November evening, successful Lina invites her friends to her husband’s anniversary at a luxurious country residence. An eminent public gathers in a pompous, castle-like mansion. This is where terrible things begin to happen: suddenly one of the guests dies at the hands of an unknown person. But the criminal does not stop, the victims follow one after another. Private detective Olga Paleva gets involved in a risky game with a devilishly smart and extremely dangerous killer...