As the three siblings Dan, Bridget, and Sean Moody return to their family's home for the holidays, things take a turn for the worse.
As Sean Sr. decides to revive the family's tradition of caroling, things get out of control when a surprise guest makes an appearance.
When Dan meets cousin Marco's girlfriend, Cora, he develops a crush on her, which makes him feel guilty about it. Bridget confides in someone.
When Sean Jr. finally agrees to work with his dad in their Heating and AC business, things take a turn when a rival company threatens the future of the family business.
As Christmas arrives, Sean Sr. is honored when he becomes the lector of Midnight Mass.
Things take an unexpected turn when Sean Sr. invites surprising guests on Christmas Eve dinner, as the Moody family is put to the ultimate test.