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After suffering a concussion from a grenade blast in Vietnam, Sgt. Frank Johnson has been getting flashes of his childhood in which strangely he is a ninja. Because of this, he is given a codename: "Black Fire" by the US Army. He is sent to San Sebastian together with his buddy Sgt. Jim Anderson to work as U.S. military advisers. One night, Sgt. Johnson discovers Capt. Salcedo of the local corrupt army is trying to transport arms.
In the battle for life you have to kill or be killed. Forced to fight against his friends in the deadly arena, Rex seeks revenge on the evil Malzon for killing his family in this post-apocalyptic action adventure.
Texas Ranger Daniel Custer leaves for Vietnam to find his brother Michael, a Green Beret Lieutenant who has been reported missing in action. Michael's squad was searching for a mysterious group of 'phantom soldiers' that had been using US-made arms for massacring villages and killing unarmed civilians. Daniel goes out on his own into the jungles of Vietnam to find his brother and stop these killers.
Billy is a young fighter whose sister Judith was hurt after a near gang rape. When he learns she must have surgery, crime boss Russell has Billy compete in illegal street fights. When Billy learns he may get killed, he quits but is later killed by Russell and his men, who were the ones responsible for Judith's accident. After his death, Billy must rely on one man to seek revenge for him: his best friend David. However, David must train in the martial arts before he can seek revenge. Davidy seeks guidance from the ghost of Billy as well as Billy's trainer and ally, Murphy.
