Aleksey Zlobin

A group of scientists is sent to the planet Arkanar to help the local civilization, which is in the Medieval phase of its own history, to find the right path to progress. Their task is a difficult one: they cannot interfere violently and in no case can they kill. The scientist Rumata tries to save the local intellectuals from their punishment and cannot avoid taking a position.

In their youth, investigator Ekaterina Mazurova and operative Sergei Polyakov witnessed the tragic events that took place in their native village of Zamayachny, which then received the unflattering nickname Yama. In 1990, a maniac appeared there. His victims were several girls, among whom was Valya, Katya's sister and Sergei's fiancee. Then the murders stopped, as suddenly as they had begun. For eleven long years. And all this time Sergey was living with a thirst for revenge, and Katya, in order not to go crazy, simply erased that terrible summer from her memory. But the maniac is back again. And now Katya and Sergey have to meet again to deal once and for all with the past, which, as it turned out, never let them go.