The heirs of the Kouga and Iga ninja clans, Gennosuke and Oboro, hope that the fragile truce between their peoples will endure. Yet fate spares them no peace, forcing their families into a renewed war after centuries of calm. The terms of the agreement are written on two scrolls, one listing the Kouga warriors, the other recording those of the Iga clan. Those names can only be erased by blood.