A biologist, obsessed with the idea of writing a treatise on a new kind of mouse, becomes witness to a number of bizarre and horrific events, from his son's suicide, to the S&M engaged in by respectable middle-aged men, to his own family's psychic morbidity.

In the apartment of Anna, who, judging by her testimony to the investigation, was on a business trip, a fire broke out at night. The son was saved, but as a result of a nervous shock he was speechless. The investigation, the mother and father of the child will find out the true cause of the tragedy.

A retired air force colonel comes on summer vacation to the Crimea. He comes as a non-official holiday-maker, so the main problem is to find night quarters. There is a brim-full of holiday-makers here at holyday season, and for locals the main business is to rent a bunk. And if one also manages to make money on sending pears, apples, grapes, the whole winter will be supported. Thus many locals survive, others become callous, cynical cold fish, concerned only about gains. Anna Ivanovna, the flat owner, renting a bunk to the colonel, starts reminding of the latter. Looking over a photo in a hall, the colonel suddenly recognizes himself in youth with a friend, who died of consumption and who turned out to be the Annas son.

Teleplay based on the play by Armand Salacrou.