After retiring, distinguished operative Lieutenant Colonel Stepan Trofimovich Bezbatko dreamed of a peaceful life, but his plans were abruptly changed by Russia's full-scale invasion. After a year of service on the front lines and a serious injury, Batya returns home, hoping for a respite. However, his daughter Lida, a forensic expert, asks for his help in investigating a complex murder case. Unexpectedly, Batya discovers that the young investigator he is supposed to assist is his son-in-law, Julian Sinitsky. After that, the conflict between the experienced lieutenant colonel and the ambitious young investigator intensifies even more.