Grandma Spankenheimer has a small store in the middle of the city. Grandson Jake works with her along with the rest of the family. Cousin Mel is greedy and hates Grandma's generous ways. She is so desperate to sell the store to tycoon Austin Bucks that she is willing to sabotage Grandma's fruitcake recipe. Then the song happens and Santa runs over Grandma.
Writing a story to a novelty song is not usually recommended. They even double-down with more songs. Acting out the song is cringe-worthy. Everything after that is either annoying or boring. The animation is lower grade. Despite all that, I'm invested in finding Grandma if only to get to the end. It would be more daring and fun if Grandma actually was killed by Santa. Of course, that would be asking too much for this Christmas special wannabe.