On a stormy night, two ninjas steal an important document from Ohama Palace in Edo. Ichi foils their escape they and take a family in the lighthouse hostage. The Shogun's men arrive and surround the lighthose. The document they stole is an investigation which shows proposed money distribution to the fiefdoms. The effect will be to abolish the lords and expand the Shogun's own power After a 3-day siege during which the leader show kindness to the lighthouse family, the ninjas try to escape but fail...