In a world full of ingenuity and adventure, the cunning thief and master of disguise, Arsenio Lupin III, finds himself in a race against time after stealing a treasure from a casino. While escaping from the authorities, he encounters a mysterious girl who is being chased by dangerous men. Determined to protect her, Lupin ends up in a small and idyllic nation called Cagliostro, where he discovers that not everything is as it seems.
Upon arrival, he encounters a castle that harbors dark secrets and ancient legends. The girl's fate is tied to an ancient prince, and Lupin becomes entangled in a conspiracy involving a hidden treasure and ancestral power. With the help of his friends – the tech-savvy Cerberus, Goemon, and the charming Fujiko Mine – the thief delves into a plot filled with unexpected twists, facing formidable adversaries.
The journey is not only fraught with dangers and chases, but it also reveals the more sensitive side of Lupin, who finds himself drawn to the nobility and mystery surrounding the young woman. Amidst battles of wits and dizzying action scenes, our hero will face the dilemma of either stealing the treasure or saving the girl. As the secrets of Cagliostro unfold, Lupin will learn that true wealth is not always measured in gold, but in courage and friendship.