"Monster High: Haunted" is an animated film that follows the characters from the popular franchise, Monster High. In this story, the ghouls discover a mysterious ghost school called Haunted High, where they meet new characters and learn about the challenges faced by spirits. The main characters, including Frankie Stein and Clawdeen Wolf, embark on an adventure to help their new ghost friends. They explore themes of friendship, acceptance, and the importance of being true to oneself while navigating the spooky world of Monster High.