Four migrant workers are killed at a construction site. Then a student from MSU dies as well. The murderer’s style seems clear, but the motives behind these brutal killings are not. Investigator Yelena Petelina comes into possession of ominous “riddles”—as if some Storyteller is commenting on the murders that have happened. Soon he begins predicting them, and the investigator must solve the puzzle to prevent the crime. A deadly game, like a quest, gradually tightens around the Petelina family.