Once on board the Captain's boat, whose mermaid acts as a figurehead named Sleeping Belle and is populated by monsters of all kinds, Pandora and her son transform into vampires and become living dead who will never age, but the God of Nothingness, furious at not having had his fresh flesh to eat, devours the soldiers.

Prince begs to spare him and the monster accepts; after having swallowed him, transforms him into a being with a head of moon baptized the Gibbous and allows him to seek revenge on Pandora and the Captain of the Dead.

Taking advantage of a game with Marguerite, Claude and Ophtalmo, Little Vampire decides to go to Michel's to ensure his safety against the advice of Fantomate who no longer wants to go out because of the Gibbous.

Michel is then invited to meet the Captain of the Dead who, finding him sympathetic, makes him swear with a pirate oath to be a faithful friend to Little Vampire and never to reveal his existence to anyone.

At night, he is surprised by the appearance of Gibbous who, knowing that Michel has been dating his prey for a long time, blackmails him: if he does not reveal to him where Little Vampire and Pandora are hiding, he will kill his grandparents.

Fantomate accuses him of betraying his oath and tries to hurt him but Michel gives up protecting his grandparents and withdraws the message but he falls into a trap door which leads him to Little Vampire and the monsters.

The latter declares that it cannot go on like this but the Gibbous bursts into tears at the idea of having to stop wanting revenge and admits that he needs company, otherwise he becomes mean.

Gibbous, convinced, recognizes that Pandora loves the Captain because he saved her but he does not know what to do because the sleeping princesses who must be awakened are rare.