Who is Rokai? When Shigure is threatened by Yamidoro and his clan, a protector appears in the form of a strange little man with amazing abilities. However, even he cannot prevent the Kimon from kidnapping Shigure. Someone must save the Light Maiden!

The action moves to sea as Jubei's party searches for Shigure, who is stranded on the water with the Kimon clan. Onboard Jubei's ship is a mysterious samurai. Is he friend or foe? The group must find out as passengers on the ship start turning up dead.