Marceline the Vampire Queen does not want to be a vampire any more, but can Princess Bubblegum concoct a cure? At the same time, five of Marceline’s most fearsome foes return from her past. Finn, Jake, Princess Bubblegum and their friends join the Vampire Queen’s fight against her immortal enemies./As Marceline is tied up and about to be doused in the light of the rising sun, she goes through several flashbacks to past memories in her extraordinary life. Does it mean that Princess Bubblegum’s cure worked?