Quick recap
Raoul de Limésy, yet another Lupin alias, is smitten with a green-eyed girl he crosses paths with in Paris. Soon after he finds her again in the middle of a crime on a train, with the police, and Inspector Marescal, on her trail. Sure she's innocent, Raoul protects her, flees with her and digs into who set her up. The plot runs through an inheritance, a secret tied to a spring of rare waters and a villain who wants Aurélie, the girl, for himself. Between chases and disguises, Lupin has to save her and uncover what she's forgotten about her own past.