When Owen shows up unexpectedly on Christmas Eve with a gift for Angie, she desperately seeks out help from Will finding a present for Owen last minute. While doing so, Angie learns how bad Will is at giving Sophie good Christmas presents, or so it seems. While Graham begins to doubt the existence of Santa Claus altogether, the group worries Miggy may still believe in him. Meanwhile, Douglas invites Poppy, who is dealing with her first Christmas without Rory, to compete in a series of cutthroat Christmas-themed competitions.

Douglas discovers that Amy is a math genius and is overwhelmed with how much time he has to spend to treat his daughters as individuals for the first time ever; this eventually leads to Emma moving into their private shed to get some space from Amy. Meanwhile, Graham makes a new friend at school, causing Angie to have to spend time with his new friend's mom, Nora, to Angie's chagrin. After Angie meets Nora in person and enjoys spending time with her, Poppy starts to grow jealous of Angie's newfound friendship.