In 19th-century Paris, young vampire Noé finds the "Book of Vanitas" in the hands of a doctor, who tempts Noé with a plan to cure all vampires.

Dominique offers Jeanne advice; Jeanne surprises Vanitas with an invitation, and Dominique shadows them; Noé encounters Lord Ruthven, but 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; Vanitas hears a certain monster has returned and sets out with Noé to investigate.

Vanitas and Noé travel to Gévaudan to search for the Beast.

Vanitas and Jeanne spent the night together; Vanitas learns Dante withheld information.