Susumu's desire to become a ninja escalates day by day. As Susumu continues his solitary training, Iga-ryu ninja Madara no Hanzo appears. Susumu immediately becomes Hanzo's apprentice. However, at the same time, a thief who commits crimes using ninja-like techniques appears and causes a stir. Hiroshi and his friends suspect that Hanzo, Susumu's master, is the culprit, but...