While shopping in Oedo Town, Goemon and Ebisumaru feel the ground quake as a peach-shaped flying object sails overhead. The vessel fires a laser at Oedo Castle, turning it into a European-style castle with spires and flags. Worried for the safety of the Lord of Oedo and his daughter, Goemon and Ebisumaru retrieve a chain pipe from Mt. Fuji and assault the castle. Inside is Baron, a member of the fashion-loving Gang of Four who reveals he was sent to turn the castle into a stage. Goemon shrugs him off and defeats the King Robot Congo to free the Lord and find a miracle item. The Lord asks Goemon to catch them and gives a Super Pass for access to the roads of Japan.