When Selma the Wicked Witch enlists an arrogant little elf named Grumper and his pet dragon Grus to transform Christmas into a whole new holiday known the world over as Witchmas, it sparks mayhem on the eve of the big day! As the monsters of Halloweenland rally to attack the North Pole yet again, it's up to Santa's Christmas minions to defend all that they hold dear! Enter the ever-vigilant ELF Detective Agency - Jingle, Bingle, Tingle, Dorabelle and Cheer - to save the day in Witchmas!