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Russia, 1959. A KGB major investigates the mysterious deaths of a group of nine student hikers in the Ural Mountains. Troubled by his past as a WWII veteran, he has a sixth sense and death seems to follow him around as he digs deeper into the mysterious incident. The more he learns, the more it becomes clear: the reason the students died will never see the light of day.

The end of the 19th century. In the provincial city of N, a series of mysterious murders takes place. The Metropolitan investigator Goremykin arrives at the scene of the crime . The search for the killer leads him to an unexpected conclusion - a revolutionary circle has been created in the city, which consists of two young men who recently returned from Switzerland.