Ogami viene incaricato di uccidere la pericolosa Oyuki, una temibile guerriera che uccide e disonora i samurai del paese. Durante il viaggio alla sua ricerca, il lupo solitario e il suo cucciolo incontreranno Gumbei Yagyu e si confronteranno con il padre di Oyuki, in un intenso dialogo dove i due padri si interrogano sul loro triste destino.
Oyuki, a tattooed female assassin – the renegade member of a ''daimyō''s personal bodyguard detail – is killing every man that is sent up against her. Along with her deadly use of the short blade, she strips to the waist while fighting to reveal elaborate tattoos on her chest and back. On her front is a kintarō grasping her left breast. A portrait of a mountain witch covers her back. She then cuts off her victims' topknots, or chonmage, which brings dishonor to the dead man and his family.
