Uncompromising and ruthless to crime, police captain Alexander Dichenko has long gained a reputation as a lone hero, both among criminals and in the eyes of colleagues. For his cool temper, he received the nickname "Wild".
Police Lieutenant Colonel Alexandra Kushnir was transferred from the Department of Internal Affairs of a large city to a small seaside town and appointed head of the criminal investigation department. The men's team is wary of the new leadership. But thanks to her logic, Alexandra successfully solves serious crimes. She is quickly gaining credibility among new colleagues.
Year 1944. Shortly before the start of the Crimean Offensive, the ships of the Soviet Black Sea Fleet and the Azov Naval Flotilla are in serious danger: German underwater commandos are preparing a large-scale operation to destroy the main combat units of the Soviet fleet in ports and roads. Aware of the seriousness of the threat, the Soviet command is developing an operation to detect and destroy the main base of the German underwater saboteurs.