Set in Okinawa, Japan. A middle-aged yakuza falls in love with the daughter of his boss's mistress. The middle-aged yakuza kidnaps her and locks her up.
In Okinawa, a down-and-out middle-aged yakuza underling named Shidara kidnaps and confines a high school girl named Yui, the daughter of a fellow yakuza’s mistress.
A middle-aged yakuza, Sanada claims that the problematic daughter of his boss, Yui is his biological daughter. He kidnaps Yui and locks her up in order to teach her how to be a good educated girl.