In this television special, Lupin III is at odds with Jigen while Fujiko is after a priceless antique watch. Zenigata is accused of being Lupin III's business partner and is arrested promptly. Goemon is tasked with cutting a powerful jewel in order to thwart a supercomputer. However, Jigen is forced to work for a tycoon and tyrant that kills the parents of a child prodigy; Her mother happens to be an exfiance of Jigen. The prodigy as well as Chopin's family belongings are stolen and are now in the possession of the man who has since campaigned for presidential election using the jewel as leverage. While Jigen and Fujiko befriend the prodigy, Lupin III & Goemon attempt to control the powerful supercomputer, and Zenigata plans to arrest the mongrel mogul.