While attempting to help Frankie Stein learn more about her freaky cool scary heritage, the fashionably fierce ghoul friends travel back in time to the first day ever of Monster High! There, they meet Sparky, a skull fantastic teen with an obsession for creating life. But when Sparky follows the ghouls through a killer time portal to modern-day Monster High, the event results in eight of them fusing together into four creepy terrific hybrid Monsters. Now, they'll really have to work together to control their bodies in the big Bite centennial Play and stop one of Sparky's experiments from destroying imperfectly perfect Monster High!