Tongan Ninja plot
Young Sione, along with his comrade Marvin and his father, crash-land on the small island of Tonga. On their journey to the island, however, a catastrophe happens for Sione. His father dies, murdered by wayward piranhas. Several years later, Sione has been renamed Tongan Ninja, while his ex-mate Marvin calls himself Action Fighter. They are still on the island, where they are trained in rich martial arts. Tongan Ninja is sent to New Zealand to protect Miss Lee and her restaurant from an intrusive syndicate. Its leader is Mr. Big, who is not pleased with the arrival of Tongan Ninja. Mr. Big sends several warriors to the ninja, so that our hero has to deal with Knife Man and Gun Man among others. When Action Fighter suddenly appears on the scene, a fight is inevitable.