Shortly after a daring jewelry store robbery, two murders occur in the city. An experienced investigator suspects that there is a connection between these crimes. But there is no proof. At the same time, the gang leader not only does not think of hiding, but calmly communicates with the investigator in the vacation home. He is sure that he has subtly calculated all the moves, and therefore he is invulnerable.
On the way for fishing Leonid Karetnikov finds the body of a man on the roadside and admit a car driving out of there. While Karetnikov called the police, the body was gone. Also disappeared the bag with tools to crack safes, lying next to body. Pursuing the investigation of the case, Colonel Kornilov states that the victim is probably Lev Kotlukov - known "safecracker" nicknamed Leo the Boar. Also, it looks like he got hit by a car belongs to citizen - professor of the Institute, which has no relation to criminal organizations. To reveal the intentions of criminals, Kornilov decided to send his man Major Bugaev undercover to the gang.
The film comprises four novellas: (1) “From Boredom”. A wealthy matron, bored with life, embarks on a romance with her children’s romantic tutor. (2) “Nerves”. Haunted by tales of the supernatural, Vaksin can’t sleep and is found in the morning napping on the governess’s chest. (3) “The Avenger”. A husband plans to kill his unfaithful wife but abandons the plot when he dreads the punishment to come. (4) “The Proposal”. A tragicomic matchmaking tale of landowner Lomov wooing his neighbor’s daughter.
