As Marshall, Gilbert and Amy are preparing for her father’s Spooktacular Halloween-themed wedding to his fiancé Carl, plans go awry when they discover that their mummy friend Harold and his beloved Rose may be in danger.
When a warlock threatens Wendy the Good Little Witch, she and her aunts hide out at a resort where Casper the Ghost is vacationing with his uncles. Although Casper and Wendy are told ghosts and witches don't get along, the two are kindred spirits! This spooky family-friendly adventure finds Casper and Wendy bridging the ghost-witch divide to battle the warlock who is intent on destroying Wendy.
In the Kingdom of Avalor, Elena takes Naomi up a mountain to show her favorite view of the kingdom. Elena laments to Naomi how she was trapped in the Amulet of Avalor for forty-one years, and then presents to her a broken wand. She tells her that it was Shuriki's wand and how she would still be trapped in the Amulet if it was not for a brave young Princess: Sofia. Elena then proceeds to tell Naomi the whole story ...
The ambitious friends come together during the holidays after a mystery assailant targets one of their own. A comedic thrill-ride follows, as the wild and unpredictable Psych team pursues the bad guys, justice … and, of course, food!