A commando of retired US SEALs must invade an island in North Japan from where a rogue ex-SEAL menaces to launch a nuclear strike against the US. Because of a leak of natural gas, fighting is restricted to blade weapons.

Three unknowing martial artists are summoned to a mysterious island to compete in a tournament whose outcome will decide the fate of the world.

Fight matches, that end when a man is either unconscious or dead, are fought in Tijuana. 2 naive friends, hoping to make a quick buck, go there. One owes money to a loan shark - giving them plenty of practice in no rule fights.