Usagi is the granddaughter of the leader of a prestigious ninja village, but she's such a klutz that she's never made it out of the kiddie class. Frustrated with Usagi's lack of progress, her grandfather sends her to marry Lord Hanzo and have lots of ninja babies. But the lord has no interest in her or her childbearing potential!

After she sees her childhood friend Kame having a tryst with Ranmaru, Usagi concludes that Kame has betrayed Iga. When she confronts Kame, Ranmaru has Usagi imprisoned and Kame is seriously wounded! What are Ranmaru's plans for the two of them? And will Usagi return to Iga alive?