In 'Psy 3: W imię zasad,' the protagonist, an ex-convict turned police officer, finds himself investigating a complex crime while also struggling with his own troubled past. As he delves deeper into the case, he must confront old enemies and make difficult choices that test his principles and loyalty.

A sequel to the first movie, Psy 2: Ostatnia krew (1994) follows a former secret agent as he is released from prison and gets involved in a dangerous situation with an arms dealer. As he tries to survive and uncover the truth, he faces various challenges and confronts the mafia.

In a post-communist city, a gang of criminals navigates the dangerous underworld filled with violence, betrayal, and conspiracy.