Now that Bobby has moved into Liz's parents' guesthouse, he's been warned that neatness counts – a lot! But his attempt to make coffee with Philip's fancy cappuccino machine leads to a burst pipe in the kitchen. In desperation he calls his dad, Mace, to help fix the calamity before Philip gets home.

Bobby and Liz's families are trying their best to blend their very different styles of celebrating Christmas when a Christmas Eve delivery to Philip and Simon's house injures "Santa" Mace. And Bobby feels pressure to compete with the lavish Christmas gifts that Philip and Simon have planned for Liz.