Shinobi: Heart Under Blade

In Japan in 1614, Shogun Ieyasu Tokugawa has finally brought peace to the land. Only one major loose end remains: a pair of powerful, arch-rival ninja clans based out of hidden villages, ones with warriors of such strength that they could be a threat in this new era of peace. After witnessing their power, he concocts a scheme to deal with the Koga and Iga clans: nullify a 400-year-old nonaggression pact between them and get the five top warriors on each side to fight each other under another pretense, hopefully eliminating both sides and thus his problem. Although many of their fellows are eager for the fight, the plan proves problematic for the Iga heir Oboro and Koga heir Gennosuke, who have secretly fallen in love. They are forced to choose between love and clan loyalties in a story that can only end in tragedy.