Meet THE MOODYS, a tight-knit, but slightly dysfunctional family of five, all of whom gather in their hometown of Chicago for the "perfect" holiday. The family includes SEAN SR.; his wife, ANN; and their three grown children – DAN, the youngest of the siblings and the "creative one"; BRIDGET, the middle sister and the "overachiever"; and SEAN JR., the oldest sibling and "screw-up," still living at home with his parents. Freshly single, Dan returns to his childhood home for Christmas to find it's in various stages of disarray, with one functioning bathroom. As the extended family gathers for a welcome meal, Dan meets CORA, with whom he instantly clicks. There's only one problem: she's already dating his cousin.

In an unexpected turn of events, all the Moodys find themselves living under the same roof again when Bridget, who lives in the Chicago area, returns to her childhood home with a suitcase in hand after a fight with her husband.

Christmas caroling is a Moody tradition that Sean Sr. does not take lightly. However, when an unexpected guest shows up to the Moody house, caroling takes a hilariously embarrassing turn.