The murder of a crewman while ashore in Hong Kong leads his friend and shipmate to partner with a local to find the killer. The murkier back alleys are explored and periodic fights break out as someone wants their investigation to end.

Chuck Connors stars in this routine martial arts feature as the Colonel. He sends agents Sonny (Mike Kelly) and Dennis (George Nichols) to Taiwan in search of microfilm containing experiments on genetic engineering. The agents soon find themselves up against Japanese killers known as the Sakura who plan to sell United States secrets to the Soviet Union. Sonny and Dennis train with a martial arts master in order to fight the enemy and obtain the coveted microfilm.