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 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?

The meeting with Lord Ruthven confirms Vanitas's hunch. Vanitas and Noé report back to Count Orlok and hear about a string of vampire abductions. Dante confirms this, which leads them underground. Will they survive their venture into the depths of Paris?

The battle with Roland is on! Vanitas and Noé flee with the Chasseurs in hot pursuit. Vanitas reveals why he entered the Chasseur's underground domain and how he knows his way around. After an unnecessary amount of drama, Vanitas finds whom he seeks.

Dominique offers Jeanne advice. Jeanne surprises Vanitas with an invitation, and Dominique shadows them. Noé encounters Lord Ruthven, but after their previous meeting, he doesn't know what to expect. Jeanne keeps her promise, and Vanitas makes one to her.

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?

Noé learns Naenia took Chloé's true name. Chloé's past and the d'Apchiers' history come to light, including her friendship with Jeanne, the Alteration Engine, and Ruthven's friendship with Chloé, which he shattered by trying to take the engine research.

Noé unwilling taps into Jean-Jacques memories and learns what happened to him and how he befriended Chloé. The Beast's true identity and the vast conspiracy behind it also come to light. Vanitas tries to stop Chloé from activating the Alteration Engine.

Chloé reveals why she wants to kill Naenia. After Naenia's true nature is revealed and Chloé's malnomen is triggered, Vanitas and Noé scramble to save Gévaudan with some unexpected help. A Church cover-up comes to light along with Jeanne's dark past.

As Noé sucks Mikhail's blood, he gets a glimpse of the latter's past with Vanitas. Details emerge about Vanitas's parents, his history with the Vampire of the Blue Moon, and the experiments he endured. Mikhail is delighted when Vanitas comes to save Noé.