Fionna was always taught to fear vampires, but when she meets one he seems surprisingly human. She sees just how wrong she is, but can she show everyone else? On top of that can she stop the Ice Queen and the other villains of Ooo? Gore and language

After Marceline helps Marshall Lee get rid of his competition for Fionna, her secret visits to the Land of Aaa weakens the border between their two dimensions, everyone is thrust into Aaa, and the reality of her mistake with Gumball illuminates.

The story of Fiona's quest for a new life after it all ended in Aaa. Fiona will have to fight love, hate, abandonment, and death to live through this new battle. She also finds out that it turns out monsters aren't the only thing that get in your way.