A wealthy businesswoman, Valentina Trunova, was found maimed and raped in her own home. In the same dacha village, another rape was committed, the victim of which was the young Diana Sysoeva, the wife of retired general Grigory Sysoev, personal belongings were stolen from their homes. Suspicion falls on the locksmith Ogureyev, who installed new locks in the houses of the Sysoevs and Trunovs on the eve of both crimes - they find stolen things from him. But the investigation establishes the personal motive of Edward, Valentina's husband - in the event of the death of his wife, he receives all of her fortune.

A cooler bag with the corpse of a newborn girl was found in the river channel. Investigators speculate that the infant's killer is a minor mother, possibly one of the students at a nearby youth sports school. However, in the course of further investigation, the examination establishes that the child suffered from a rare incurable genetic disease common among Jews. Investigators find a family in which a girl of the same age, Yulia Vigdorova, recently died.