Sean Jr. finally agrees to join Sean Sr.'s Moody Heating and AC business, but trouble ensues when a rival company infringes on their territory. Meanwhile, Bridget finds someone in whom to confide, while Dan struggles with the guilt of being interested in cousin Marco's girlfriend, Cora.

With Christmas quickly approaching, Sean Sr. receives the top honor as the lector of Midnight Mass.

When Sean Sr. invites some unexpected guests to Christmas Eve dinner, Ann starts to unravel. And just when the Moodys think things couldn't possibly get worse, they are faced with a devastating challenge. All Ann wanted was a nice, white Christmas!