Emma struggles to succeed as an architect. Now, she's heading home for Christmas, but just before she does, she encounters a Santa who wonders what she wishes for Christmas. She wishes for her life to sort itself out. The next day, she finds herself in a 'sliding door' moment at the airport, and for the following day, she gets to experience parallel events in two different scenarios: one where she stays in town and another where she goes home. In town, she meets Max, whom she's been eyeing in the office building for a while, and at home, she meets Drew, who has always lived next door to her parents. But what does she really want?
I found this a bit dubious at first, and it's a bit slow to start, but after a while, you get into it, and the 'sliding door' concept, which isn't entirely straightforward, eventually works.