It stars Leo Fong, Cameron Mitchell, Hal Bokar, Philip Baker Hall, Stack Pierce and Vic Silayan.
It was written and produced at a time when there was a succession of popular Hollywood action films incorporating martial arts-themed plots and storylines.
During Japan's occupation of The Philippines in World War II, Japanese boy Kimon Matsuda witnesses the murder of his parents by American soldiers from the 75th Rangers infantry.
Vowing revenge for the death of his parents and especially the rape and murder of his mother, the boy begins studying Asian martial arts.
As an adult, Kimon opens an import-export business in San Francisco and collects newspaper reports and other information about the 75th Rangers soldiers who had served in World War Two.
Although the Rangers have hosted many gatherings and reunions in the US over the years, Kimon sees a special opportunity in the Philippines to exact revenge on both the Americans and also the Filipinos responsible for the death of his parents.
After preparing his deceased father's sword, Kimon lies-in-wait in a dark alley for Victor Quantez, a Filipino who assisted the Rangers as a runner and messenger boy during the war.
Meanwhile across town, the Rangers attend a dance and become embroiled in a bar-room brawl when Steadman attempts to roughly coerce a Filipino girl who has caught his eye on the dancefloor.
Due to the damage and destruction caused during the fight, the Rangers are called before their Filipino war comrade, Raoul Amante, now a senior-ranking police inspector in Manila, who is also participating in the reunion.
Amante urgently phones Hacker late in the evening to convene a meeting and warn him of a vendetta being played out against the Rangers.
Armed with this information, Amante and the police department deduce that Kimon Matsuda is the person responsible for the spate of deaths during the Rangers' reunion.
As the guard opens the door he is disarmed by Kimon, who abducts Steadman and takes him prisoner inside a vault in an industrial park and construction site that contains demolition explosives.