Sister Streetfighter

She's a one woman death squad. Tina Long [Sue Shiomi], woman karate fighter, goes to Tokyo to find her brother, a narcotics agent who has mysteriously disappeared while investigating a narcotics ring. She visits a former karate teacher, who was helping her brother before he disappeared. He introduced her to another woman karate master and Sonny Hibaki [the spectacular Sonny Chiba], a super karate master and Ninja - a fighter who can become invisible! They offer to help Tina. They get some information from a girlfriend of Sonny's, who has been marked by the ring, but as they are talking the woman is attacked by a mysterious gang and killed But she has told them enough for Tina to break into the gang boss's house. She is trapped. The thugs find her and throw her down a cliff. Her control of her body saves her life.