Heartblade Tokimaru, the ninja that dropped in on Ai, Teru, and Iko, has arrived to take Ai, the princess of Soga Village, back home. When Teru asks why she ran away, Ai responds by saying that she wanted to see the world and live more freely after being so sheltered in her own village, although Tokimaru insists that was solely for her protection after her clan lived away from civilization. Ai reveals the wooden stick she had been carrying around as her katana, Purity, which has the power to read other people's hearts and has told her about something she feels she needs to do...