A single mom named Gabbie hires a tour guide, a psychic, a priest and a historian to help exorcise her newly bought mansion after discovering it is inhabited by ghosts.
As they enter sophomore year at Monster High, Clawdeen Wolf, Draculaura and Frankie Stein face new students, new powers, and an even bigger threat that could not only tear their friendship apart, but could change the world forever.
When the infamous "Sweet Sixteen Killer" returns 35 years after his first murder spree to claim another victim, 17-year-old Jamie accidentally travels back in time to 1987, determined to stop the killer before he can start.