Usagi sees a band of retainers attacked and nearly wiped out for possession of a sacred rock, Toyama Ishi. Usagi agrees to help the surviving retainer, Yoshi, deliver the stone to his master. Eventually, the attackers return and in their clash, Yoshi is killed and the stone is shattered. Determined to complete Yoshi's mission, Usagi picks a simple stone from the river and delivers it to Yoshi's Lord Akagawa, who cannot tell the difference.