Working as a hard-to-kill mercenary in South America, ex-yakuza Shozo Iwaki (Tak Sakaguchi) is informed of the death of his gang boss father, Kenzo (Akaji Maro). Returning home after four years, Shozo discovers that his father’s number-one man, Kurawaki (Shingo Tsurumi), has double-crossed and assassinated Kenzo, leaving Shozo not only in charge of what little remains of the Iwaki Family, but also burning with the desire for vengeance. After a titanic battle in which an entire building is leveled, both Shozo and Kurawaki are left barely alive, Shozo missing an arm and a leg.