While testing one of Katia's business schemes, Igor makes an alarming discovery about a previous acquaintance. The team investigates the death of a woman who fell out of her apartment window.
Korolyov learns that his service weapon, which fell down a sewer drain, was used in a recent murder. Igor tries to access his mother's archived case file.
Despite tension among the team, they work together to find Stas who has been taken hostage. Dania has a confrontation with the men who have been following Igor. Igor gives Vika an ultimatum.
Igor is being harassed by colleagues, all the while trying to do a good job. At his first crime scene, a 9 year old victim of a hit and run, he realizes he may know who may be involved, leading to circumstances that affect him personally.
When Korolyov is suspected of a fatal stabbing, Vika defies orders and assigns a secret investigation. Igor learns where his Dad was when his Mum died.