Draculaura has a fright idea when her dad lectures her class on human holidays! She convinces the Monster High students that it's time for their own holiday - a Howliday! But, the students have different, competing ideas for the howliday, causing chaos. Now the ghouls must use their abilities to unite the students with the message: Holidays are about family and togetherness.

With the Storybook of Legends still in Wonderland, Raven attempts to teleport her friends there despite still getting the hand of her powers. Apple, Raven, Briar, Lizzie, Kitty and Maddie end up in Wonderland in just days away from the Queen of Heats' birthday, but they end up at Wonderland High where they meet the charming Red and White Knights. However the school is ruled by Courtly Jester who attempts to keep the girls from graduating Wonderland High for her devious plans against the Queen of Hearts.