Monster High: Ghouls Rule unearths an old battle between"Normies" and creatures - and things are about to get scary! For a long time, pupils at Temple High were cautioned that Halloween was a night to stay inside and avoid conflict whatsoever costs. But Frankie and her friends discover that ghouls and"Normies" once adored to spend the vacation together! Even the ghouls decide to turn back the clock and make use of the night time to celebrate their identity and show it is okay to"Make Yourself. Be Particular. Make a Monster!"