Nico Toscani is a martial arts expert who was recruited by the CIA when he was in Japan, he would be sent to Vietnam. While there he witness the sadistic treatment of prisoners by Zagon, an interrogator, when he clashes with him, Nelson Fox, his friend tells him to get away. Nico goes home to Chicago and becomes a cop. 15 years later, when he busts a drug dealer, he tells Nico of a major deal going down, when he busts them, he discovers a cache of plastic explosives. And before he knows it...