In Szczecin, police hunt for 23-year-old Justyna Przybysz, whose body, found in a river canal, has been mutilated by the removal of her right hand. As more victims turn up in similarly brutal murders, the local criminal investigation unit—and even a hired private detective—find themselves powerless to stop the killer’s escalating spree. The mounting terror and relentless violence breed conflict within the force and drive one officer to collapse.