Commodore Akira Hayashi is told to recover the sword and, as a matter of honor, not sign the treaty until it is recovered. Prince Ido has received Hayashi's order to regain the sword and goes to the castle of Yamato alone. Similarly, Perry has ordered Captain Lawrence Hawk to retrieve the sword. Hawk brings Midshipman Robin Gurr and Crew Bos'n Cave Johnson. The three get separated and the movie centers on their stories.