Japanese audio; English subs. Ayaka (Rina Takeda) was born to a legendary karate family. When she was little, her father was killed by a mysterious group and her younger sister was taken by the group. As time passes by, Ayaka lives in Yokohama as an ordinary female high school student. An incident leads Ayaka to meet her younger sister once again, but her sister is now a lethal killing machine. To get her sister back, Ayaka must stand up to mysterious group alone.