A giant castle in a mysterious world. Two shady Majin, Gomah and Degesu, watch a monitor. The monitor shows Goku and the others having a fierce battle against Majin Buu. Gomah and Degesu head to Earth to execute a certain conspiracy.

The masked Majin who appeared before Goku and his companions is a young girl named Panzy! While Glorio gives her the cold shoulder, Panzy insists on acting as their guide. The group reaches a suspicious castle!

Goku and his companions arrive at the mystic Second Demon World where a giant ocean spreads as far as the eye can see! The party is amazed at the new world but is immediately attacked by Gendarmerie that have been sent by Gomah!