In the fourth installment of Cannon's ninja films, Michael Dudikoff, an American soldier based in the Philippines, drives through the jungle with an arms convoy. He helps fight off an attack led by a ninja and rescues the base commander's daughter, Judie Aronson, for good measure. But
after a strained thanks to Dudikoff, her father immediately phones Don Stewart, the local crime czar, to tell him their plan to steal the arms was foiled. Stewart starts making plans to get rid of this new annoyance. Meanwhile, back at the base, Dudikoff explains to his new friend Steve James that
he has amnesia and doesn't know where he was trained in the martial arts at which he is ...