Noé is on an airship bound for Paris, where he hopes to find the legendary "Book of Vanitas." He meets a woman named Amelia as the ship nears its destination, and then all hell breaks loose when a mysterious stranger appears. Has Noé's quest found him?

Vanitas and Noé are in a bind until an invitation arrives. At their benefactor's, they find they must prove the "Book of Vanitas" can restore a vampire's true name. They try to secure the necessary proof, only to encounter someone else after the book.

Vanitas and Noé travel to Gévaudan in search of a creature known as the Beast, but things go sideways when they encounter a murderous paladin, a hostile acquaintance, and an old nemesis. Will our heroes survive these threats, not to mention the Beast?

Vanitas tries to convince Jeanne not to slay Chloé. The cause of Astolfo's hatred is laid bare. Jean-Jacques finally learns Chloé's end game and tries to stop her. Vanitas activates the Alteration engine to save Chloé and Gévaudan, but is it too late?