Ryota Nonomiya is a successful businessman driven by money. He learns that his biological son was switched with another child after birth. He must make a life-changing decision and choose his true son or the boy he raised as his own.
O-Shin is a young brothel worker who, one night, helps a young samurai escape from his pursuers. Against the warnings of her fellow workers, particularly Kikuno and the brothel's owner, O-Shin falls in love with the samurai.
