Polina and Igor investigate the mysterious murder of an auctioneer, whose identity turns out to be a fake. At the same time, Polina helps Marina Golovina, the wife of her boss, who is hiding her tragic secret. Polina and Maxim Belyakovsky's relationship is developing: he is showing more and more concern, but Igor finds information about Maxim's possible involvement in a fatal accident.

At first glance, the death of a young man hit by a car seems to be an accident, but his unusual lifestyle - impeccable order in everything suggests a deeper mystery. The investigation leads to a trail of family secrets, where old grudges and a thirst for inheritance could become a motive for a crime. Meanwhile, a lead finally appears in Olya's case.