Convicted for a crime he did not commit, kickboxer Max Rivers is sentenced to life imprisonment in Carcel de Cordoba, the world's most impenetrable prison. He discovers a corrupt regime run by the chief warden, who organizes high-stake fighting contests. When Rivers' appeal is quashed by a crooked judge, he finds himself forced to rely once again on his fighting instincts as he enters the ring in the prison.

Sergeant David Callahan leads a task force of U.S. Marines on a failed mission. Five years later, working as an adviser to Thai Special Forces, he is forced to return to the Vietnamese P.O.W. camp he escaped years before, to fight a deadly duel.

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.

1987 film

A boy sees his parents gunned by criminals due to unpaid debts. Twenty years later, the boy, Mark Quinn, has become a hard-hitting cop, the kind that hates criminal scum, bending the rules to catch those criminals and drive them to despair.