Natalia Gorenko works in the patrol police and is preparing to meet her 45th birthday. She is having a difficult time breaking the relationship with her only son, Elijah, who has not been dating her for seven years. Elijah cannot forgive the mother that, as an investigator, she refused to unseat her son from prison for the crime he committed. For the same reason, Natalia's husband, forensic scientist Stepan Feofanov, was outraged, outraged by her superfluous principles. When released, Elijah avoids any communication with his parents, and they, in turn, have not communicated with each other for years. But once in the mortuary for autopsy comes a body with traces of violent death, in which the medical examiner recognizes his son Elijah. The tragedy unites the former couple, now their main goal is to find the son of the murderer.