When Lupin arrives in Italy, he receives a letter from the Masked Count: “let’s see which of us will be first to find the ancient Inheritance of Cagliostro.” Never one to back down from a challenge, Lupin finds himself on a runaway train – literally - carrying his soon-to-be-fiancée, the wealthy tabloid queen Rebecca. After Lupin spends his wedding night vying for the elusive Crown of Libertas, he faces off against the superpowered MI6 agent Nyx to steal a fragment of a famous necklace. What secrets will these artifacts reveal about Count Cagliostro’s lost treasure and Lupin’s mysterious masked opponent?