Immediately after the death of the father, between the children - Alla and Yevgeny Kostetsky - there are insoluble disputes over the burial of the body. Eugene insists on a traditional funeral, Alla insists on freezing the body in liquid nitrogen. Passions were not destined to boil for long: soon Alla was found dead.

Police ensign Kalashnikov tirelessly conflicts with his superiors and colleagues. He does not find a place for himself and at home: he rushes about all night long, hiding from imaginary pursuers, which causes concern for his neighbor in a communal apartment. Soon Kalashnikov falls under suspicion of murder.