Sixteen-year-old schoolgirl Masha Kolobova was found dead on the street. The forensic medical examination establishes that shortly before her death, the deceased had sexual contact. The keys to the unknown premises were found with the girl. The mother of the murdered woman claims that her daughter was an exemplary student and studied in a theater studio. The head of the studio, Stanislav, who had previously been seen in dubious ties with his students, falls under suspicion.

Investigators find out that for about a year, Tatyana Polyakova, who has been in a coma, is suddenly transferred from a rehabilitation center to a hospital with suspected pneumonia, where during the examination it turns out that she was raped and is now expecting a baby. Tatyana's parents are sure: the culprit of what happened is her young man Dima. But genetic examination removes suspicions from him and from some of the center's employees. Suddenly, by order of the neuropathologist Minkov, Tatyana is transferred back to rehabilitation, where the gynecologist is ready to have an abortion for her.