The daughter of a major banker Vladimir Kuznetsov and her brother's friend Ivan were found murdered in the girl's apartment. Very little time passes and it turns out that Robert - Alla's brother - is also dead. The investigation suspects Tina, Kuznetsov's new wife. But detectives are confused by the fact that peas were neatly laid out in a row at the crime scene. This is almost unmistakable evidence that the killer has serious mental disabilities.

Fitness center owner Ekaterina Turinina was found dead in her own bathroom. The investigation establishes that before her death, she had a serious quarrel with her daughter Julia, because of her fiancé Konstantin Rakov, who had a connection with a rival firm Turinina, who had long wanted to buy her business. Catherine considered him a swindler and offered him money so that he would leave her daughter alone. But Konstantin did not take the money. A quarrel with her mother served as an excellent motive for murder for Julia, and she is arrested.

The educational center for gifted children shook with horror: in an instant, the educational institution lost two employees - the director of the center, Alexander Vorobyov, and the psychologist Kira Mozheiko were killed. The detectives established that Alexander and Kira were lovers. Who could benefit from their death? Perhaps the true target of the criminals was not Vorobyov at all, but Kira, without whose recommendation not a single child could enter school.