While having a blast at their favorite amusement park, Mega Mountain, the Ninja brothers witness the kidnapping of TV action superstar Dave Dragon (Hulk Hogan) by evil Lothar Zogg (Jim Varney) and his kid-hating love Medusa (Loni Anderson). When Medusa's henchmen surround the park and demand ten million from the park's owner, the Ninjas strike back with a vengeance. Join Rocky, Colt and Tum Tum for a roller coaster ride of fun, action and comedy.