Meg's brother Rob and his fiancé Delaney have been engaged for some time now. In fear of their mothers' propensity for over-the-top celebrations, they decide to throw a party just before Christmas and then elope. When a blizzard traps their guests inside, the two mothers find out about the planned elopement and start trying to pull together the kind of over-the-top event the couple was trying to avoid in the first place. To make matters worse, a...