Three months pass after Lera's departure. Makarov builds a new relationship with lawyer Margarita, but the past does not let him go. In season 4, Verba, tired of failed relationships, learns that true love is waiting for her just around the corner of the duty station. For Popova work for the first time retreats into the background, because she falls in love with the star of police serials. Turkina in every possible way tries to push the criminalist to get married. And despite love affairs, the girls continue to fight crime, and Makarov - to clean up their mistakes.