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.

Vanitas comes to the rescue and helps Noé and company battle Charlatan's curse-bearers; Noé confronts Vanitas about his methods.

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.

The meeting with Lord Ruthven confirms Vanitas's hunch; Vanitas and Noé hear about a string of vampire abductions, which leads them underground into the depths of Paris.

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.