Lupin has invited all of his friends to a villa on a private island. It's the first time they've seen each other for the past five years. Lupin is planning a big surprise while they are all at the villa except Fujiko, Goemon, & Jigen find Lupin's behavior to be unusual. They're also curious on who the man in the iron mask is who is chained up to a wall for reasons they're about to find out.
