 Dolune, an old french thief who taught Lupin the basics of thievery has given Lupin a favor for fulfill. He gives him a half diamond called "Twilight Gemini" and wants Lupin to travel to Morocco to unlock the treasure of the Geltic Tribe. Dolune is in no condition to do it himself being in a dying state. Lupin heads out to Morocco to fulfill Dolune s favor. But is hunted down by Sadachiyo, a transvestite villain and a group of Assassins. And a French interpol Commissioner, Jean Pierre guides Zenigata to Morocco, who is looking forward in having Lupin taken in by hand. Eventually Lupin teams up with Lara, the young and beautiful leader of the Geltic Tribe, who fights with her people who been exiled from their homeland for a century. Along with some help with Jigen, Fujiko, and Goemon(who has a score to settle with Sadachiyo). The search is on for the other half of the Twilight Gemini and the Geltic Treasure itself.