The head physician Wasserman goes to prison, and the head physician Mantu replaces him (to save money, the producer decides that the same actor will play Mantu, so Mantu differs from Wasserman only in his mustache). While Mantou makes his rounds, Wasserman, who escaped from prison, sneaks into the office of the head physician. When Mantu enters the office, Wasserman injects him with sleeping pills, rips off his mustache and sticks it on himself, and hides the body. Soon, the frightening nymphomaniac wife of the head physician Mantou visits him. Desperate to satisfy her, Wasserman turns to the patients of ward number 6 for help, but Mantou's wife rejects them. Then Wasserman takes off his mustache and returns to prison. Chief Physician Mantou is once again in charge of the hospital.