In nineteenth-century France, humans and vampires coexist. The young vampire Noé is traveling to Paris in search of The Book of Vanitas, which is said to be capable of unleashing a curse upon all vampires. On an airship, he finds himself embroiled in a strange incident. It is Vanitas, a human calling himself a vampire expert, who appears before Noé in the ensuing chaos. In Vanitas's hands is the very book that Noé has been searching for: The Book of Vanitas... Following this encounter, the curtain is set to rise on this tale of vampires, curses, and salvation...