Haley lives in New York City and works at a very successful wedding planning company that caters to the elite and focuses on extravagant city weddings. So when Angela gets engaged, Haley assumes her sister will ask her to plan the wedding. Haley is surprised when Angela and her fiance, Paul, initially decide to elope. But things change two weeks before Christmas when Angela breaks down after looking through old family photos and realizes she does want a big wedding and she wants to get married on Christmas at her favorite place in the whole world, their late grandfather's Christmas Tree Farm. Angela knows it might be difficult with this short of notice but if anyone can do it, it's her brilliant wedding planner sister, Haley. Haley, who isn't a fan of Christmas weddings, or Christmas in general, tries to sway Angela that getting married in 'podunk' Pineridge at Christmas would be a disaster and that she deserves the plaza in June instead. After Angela makes it clear this is what she wants, Haley vows to throw the best Christmas wedding because she loves her sister and wants her to have her dream wedding.