A funny story about the adventures of a two hairy friends familiar from the "Six Degrees of Celebration" series.

A ghost and a French marquis wander through the Winter Palace in St Petersburg, encountering scenes from many different periods of its history.

During the next duty, patrolman Vera Sedova single-handedly prevents a tragedy at the college, but a student dies in the process. She claims that the guy had a sawed-off gun, however, no weapons were found. The policewoman is cursed by her parents and the public. The only one who becomes humanly sorry for Vera is the appointed lawyer Ilya Nesterov. Ilya is more and more immersed in the case and is convinced that his client may be right.

Anya can't let go of her abusive relationship with Igor, which is why she suffers from insomnia. In addition, Igor continues to impose his presence on her. Under stress, the girl begins to experience hallucinations and panic attacks, and with each increase in the heroine's emotional instability, Igor becomes closer.

The plot centers on an investigation conducted by the curious and resourceful Petya, despite the entreaties of his friends, family, and local law enforcement agencies, and throughout the entire journey he is "assisted" by his younger brothers, Sasha and Kostya. After a series of failures and setbacks, Petya still does not give up, collects all the evidence together, and learns the truth about who is to blame for the disappearance of the artifacts and helps return these exhibits to the museum.