Ho, ho, heyooo! Christmas is upon us and the Paddy's gang has got the spirit. Well, not really. For them, the holidays have always been a time of trickery, backstabbing, and disappointment. But this year things are going to be different as they are determined to rediscover the joy in Christmas. Join Mac, Charlie, Dennis, Dee and Frank as they embark on a holiday adventure filled with stolen toys, childhood videos, naked elves, and a bloody run in with Santa Claus.

Before Dee's baby arrives, The Gang tries to figure out who is the father by throwing a house party for all her former flings. 

Things go awry as the Gang travels to Atlantic City for a charity benefit. While Frank, Dee and Mac try to survive in the woods, Dennis and Charlie hitch a ride to the city and have the night of their lives.

When keeping the basement rodent-free drives Charlie to the brink, the gang decides to put the cynicism aside and throw a surprise party to cheer him up.

Motivated by the drama teacher who inspired her, Dee takes a job as a substitute teacher, and exposes her students to the culture of Paddy's with a field trip to see the Gang's take on the Lethal Weapon series: Lethal Weapon 5.

A blast from the past prompts the guys to expand membership, and Dee to re-consider her future.

The gang gets a real 'scare' after Dee reveals she's pregnant, forcing the guys to recall their last hazy Halloween Party to determine if one of them might be the father.

The gang attempts to open themselves up to the adventures of the sea after they purchase their 'new' boat.

Marital bliss turns to marital business, as the gang experiences the emotional and economic tribulations of divorce.