The fourth film in the action franchise finds Boyka taking on brutal gangsters to protect the widow of a man he unintentionally killed in the ring. Petio Petkov, Valentin Ganev, Teodora Duhovnikova, Scott Adkins, Vlado Mihailov, Paul Chahidi, Alon Aboutboul, Julian Vergov, Brahim Achabbakhe Added on Amazon Prime 2023-03-25. Youtube Trailer