In the U.S.-made films starring Charles Bronson, he is invariably an innocent and ordinary man who is forced by circumstances into fighting back against brutal thugs and official indifference. Many Mexican-made movies starring Eduardo Yanez cover much the same territory. In the story, Roca (Duran) is blithely making plans for his upcoming marriage and has gone to consult with his father about something. He discovers that his father, a banker, has been turning a blind (but knowledgeable) eye to Mafia doings for many years. He was willing to do this until the mob got involved in the drug trade, and now he must find some way to disappear. As it happens, the gangs get wind of the situation, and both men must go into hiding. When the Mafia kills the father, the son embarks on a one-man war.