Half Japanese Hong Kong girl Mari Hirakawa who succeeds dojo after tragic death of her Karate master and father encounters ex-karate student, ex-yakuza Chan Keung who also succeeds the half of her father's karate dojo.

Half Japanese Hong Kong girl Mari Hirakawa who succeeds karate school after tragic death of her Karate master and father encounters ex-karate student, ex-yakuza Chan Keung who also succeeds the half of her father's karate dojo. Then, Chan Keung retrains Mari for being a true heritage owner of the karate school.—Ryota Nakanishi