The rock‑solid secret of the Twilight diamond is about to be cracked. As Lupin’s mentor, Don Dolune, lies on his deathbed, he hands the master thief a gift: the diamond named Twilight. But this is only half of the treasure, the other half of the Twilight can be found in Morocco. Yet it’s not as simple as “X marks the spot” when a civil uprising is brewing between two factions in this desert paradise. Lupin must contend with his occasional partner Fujiko, his feelings for the gorgeous brunette Lara, and, on top of it all, the relentless whip‑wielding maniac Sadachiyo.