Good Samaritan Sarah Fitzpatrick has a fatal accident just before Christmas, and finds herself in the lobby before the gates of Heaven. Certain that she will be let in, she is shocked to find that her name is not on the reservation list. However, she is granted the chance to return to Earth as an "angel in training" with the requirement to help a soul in need. Sarah has the 12 days before Christmas to secure her place on the list leaving her in the race for her after-life.