As the holiday season begins, Laurel McCullough could use some good news. She and her husband, Zach, have been praying for a baby that seems more and more like an impossible dream, and they've had to move in with her beloved grandmother, Helen, who's having trouble taking care of herself. But when Laurel contacts alocal home-care organization for help, there are no caregivers available. Then Mrs. Miracle appears at the door.