Mizu is a young blue-eyed mixed-race samurai who dresses like a man to hide her real gender to survive, and seeks revenge and to kill the white men who ruined her life and avenge her mother. Set in 17th century Japan, after the ban on whites in Japan. Mizu is a powerful and skilled samurai, her opponents often compare her to an onryo due to her ruthless attitude, she is focused, serious and usually cold, she has no time for trivialities, she's a lonely woman who has been betrayed many times.