Eduard Lyamzin faced a mysterious series of crimes. The killer left inscriptions in Latin next to the bodies of the victims, exposing mortal sins: “Avaritia” - “Greed”, “Luxuria” - “Lust”, “Invidia” - “Envy”... Alexandra was glad to meet again with her longtime admirer - detective Lyamzin . If she had known that she would unwittingly be drawn into his investigation... Judge Vasechkin asked Lyamzin for help. He received several strange parcels and guessed: someone wanted him dead. And then Lyamzin realized what sin was the cause of the first murder... Our shortcomings are a continuation of our advantages. But how to notice and not cross the fine line beyond which the difference between good and evil is erased?..