The Shinobi are warriors with superhuman powers who live hidden in Japan. After more than four hundred years of war, a truce is set between the clans of the Manjidani Koga and Tsubagakure Iga. However, the Shogun retracts this truce and orders that the top five fighters of each clan must face each other. Meanwhile, a secret romance has been taking place between Iga Oboro and Koga Gennesuke. The lovers are each cast as the leader of each group, and are fated to fight each other.
It is a spectacular film with magnificently choreographed fight sequences taking place amongst beautiful scenery. The plot is tragic with a lot of death, but also takes several unexpected turns.