Description：The sea water washed up the body of a young woman on the beach of Tri-City. The unusual trauma on the victim suggested that it was a murder. The investigation was led by the ambitious and indomitable prosecutor Leopold Bilski (played by Jakob Galsoo), and the victim's mother and Judge Helena Bogucka (played by Maya Ostazeska) also participated in the investigation. All clues point to a seaside nightclub, which is inextricably linked to a female murder case 15 years ago. The information collected from the investigation and the evidence that has been covered up for many years gradually unveiled the dark veil of crime in Tri-City. Bilski and Bogucka's discoveries began to make the local police feel very difficult.