A fisherman is found strangled and investigators come to believe it may have been by the irradiated skeleton that was found near his body. The film is often erroneously listed as an alternative title for 1971's "Blood Thirst."

A sex-crimes specialist from New York travels to the Philippines to help his friend, a Manila homicide detective, solve a series of murders.

U.S. soldier Frank Dux has come to Hong Kong to be accepted into the Kumite, a highly secret and extremely violent martial arts competition. While trying to gain access into the underground world of clandestine fighters, he also has to avoid military officers who consider him to be AWOL. After enduring a difficult training and beginning a romance with journalist Janice Kent, Frank is given the opportunity to fight. But can he survive?