Kei Tsuchiya, a young karate student, is trained by her sensei, Yoshiaki Matsumura. But Kei Tsuchiya is very arrogant and spends her time degrading various other karate students in different karate challenges. One day she is approached by a mysterious organisation called the Destroyers that wants to recruit her. But too late, she realizes that it's not her,rather, her sensei Matsumura,that they are interested in.