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 Graham decides to surprise his family by traveling home for Christmas, he is shocked to discover them already celebrating with an unexpected guest of honor, his ex-fiancée, Ali. The two exes battle it out to see who the family will pick to stay through Christmas Day and who must go.