It's officially Spring Break at Monster High, and Lagoona takes her gilfriends across the sea to the Great Barrier Reef, but they are ship wrecked and end up on a mysterious skull shaped island. At Skull Shores, they enjoy the local hospitality until they realize that they are being used by a slippery showman named Farnum to lure the rarest, most mysterious monster of them all, "the Beast.”

The Monstruitas of Monster High are obsessed with going to Scaris, The City of Frights for Fashion international competition where the winner will become the apprentice of the world famous Madame Ghostier designer.

After Monster High’s roller skating team is defeated at the Skulltimate Roller Maze tournament, the ghouls team up to face an all-boys league, with the hope of winning back the school crest and restoring school spirit.

Monster High: Ghouls Rule unearths an old conflict between "Normies" and monsters - and things are about to get scary! For years, students at Monster High were warned that Halloween was a night to stay inside and avoid conflict at all costs. But Frankie and her friends discover that ghouls and "Normies" once loved to spend the holiday together! The ghouls decide to turn back the clock and use the night to celebrate their individuality and show that it's okay to "Be Yourself. Be Unique. Be a Monster!"