The Cassidys' marriage is under pressure. Shauna wants another baby. Greg doesn't. She also has to endure her obnoxious in-laws who arrive at the drop of a hat and stay as long as they like. Shauna's glad to be moving abroad. She'll be free of them at last. Or will she? Carrie, Shauna's sister, feels put upon. The burden of looking after their elderly father rests on her and she's fed up. Even though she loves her siblings, resentment builds. Can Carrie finally stand up for herself? Shauna and Carrie's brother, Bobby, has a poisoned relationship with his father, who blames him for the death of his wife. Can they settle their differences? Or are some rifts just too painful to resolve? The last Christmas the family got together was a disaster. Can they finally put the past behind them as they prepare for another family gathering?