When his travels bring him to Osaka, Tora-san falls in love with a local geisha. He helps her to track down her estranged brother, and informs his family that he plans to marry her. His plans are foiled when the geisha informs Tora-san that she is engaged.
The adventures of Goro and his fellow samurai concludes. After their turbulent journey, the seven crosses are finally united to reveal the secret of the royal treasure.