A kidnapping incident has erupted!! Is that female torture research institute involved?! Having grasped information about the dark martial arts they're mixed up in, karate master Tomoshima Eienko attempts an undercover investigation. But she falls into their cunning trap and encounters that man there. Is Koji Tsujimaru still alive?! Can Tomoshima endure Koji's torture after he awakens? The ultimate battle begins. And their true purpose is about to be revealed...
