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.

The Teacher explains the World Formula theory. Vanitas is put off by Noé and Dominique's relationship. Dominique rakes Vanitas over the coals. Vanitas encounters Jeanne again and reveals himself to the ball guests. Chaos ensues when gate crashers arrive.

Noé's encounter with Charlatan triggers a childhood flashback. His earliest days are revealed, along with Louis' dark secret. Noé grows up surrounded by friends, but an attempt to save one of their inner circle has tragic consequences.

Vanitas comes to the rescue and helps Noé and company battle Charlatan's curse-bearers. Noé questions Vanitas's methods. Some unexpected help arrives when they face another threat. Noé confronts Vanitas, but will it bring them together or tear them apart?

Vanitas and Jeanne's "encounter" during their battle in Paris comes to light. Vanitas offers to keep Jeanne's secret on two conditions. Noé and Vanitas prepare to meet Lord Ruthven. Noé ponders the meaning of love, but Domi throws a wrench into the works.

Jeanne says something that strikes fear into Vanitas. Lord Ruthven makes Noé swear an oath. Olivier is at his wits' end over Roland's obsession. Noé has a consuming thirst. Vanitas hears a certain monster has returned and sets out with Noé to investigate.

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?

Mikhail tells Vanitas what he wants. Noé and Vanitas clash. Details emerge about why Vanitas shuns others and doesn't want them to peer into his memories. Dominique's life is on the razor's edge. Noé says he can't do the one thing Vanitas