The year is 1889 in the mystical city of London. The phantom thief Lupin sets his sights on the Black Diamond known as "The Penultimate Night," owned by Mr. Fogg. Clashes ignite throughout Fogg Manor as conflict erupts over this coveted gem. Lupin, the Phantom of the Opera, Holmes, Lloyd's agents, a mage, a vampire, and the detective specializing in the supernatural known as the Cage User are all embroiled in the fight for this precious diamond. Thus, an all-star battle beyond human comprehension is set to begin!