"Mizz Mouse at Santa's House" is the story of a saucy in-between-ager who struggles to find her way to fit in at Santa's House. Her behavior becomes a headache for Mister Mouse and the rest of the crew. Eventually, through her own ingenuity and the help of Santa and Ol'Bou, an elder reindeer, she becomes a great asset and champion of all those at The North Pole.