June and Naomi, by day they're Radio DJs, by night they're the crime fighting Siamese Cats.

When Lupin heads to the kingdom of Zufu to pilfer its treasure, he incurs the wrath of its psychotic ruler General Headhunter, who places a dead-or-alive bounty on his head.

A bloody civil war is the setting for Lupin's latest caper; the leader for one of the factions holds documents written by Earnest Hemingway and contain the location of a remarkable treasure. With Goemon and Jigen fighting on opposite sides of the war, Lupin must tackle this challenge alone. As the war rages on, can Lupin secure the treasure and keep Goemon and Jigen from killing each other?!