Aspiring astronomy professor and Christmas enthusiast Holly is crushed when her longtime boyfriend Adam schedules a business trip and leaves her alone over the holidays. When she decides to surprise both Adam and her parents with a Christmas visit, however, fate, or perhaps the Christmas spirit, intervenes. Holly's bumpy holiday travel makes a turn onto the road to romance when she and her bus companion, Luke, forge an instant connection over their love of constellations and Christmas. In the spirit of the season, Holly invites Luke and his brother Bull to join her family and Adam for Christmas, which instantly creates a competition between Luke and Adam for Holly's attention. As sparks fly like shooting stars between Holly and Luke, will Holly decide to play it safe and stay with Adam or to thank her lucky stars for the Christmas gift of romance with Luke?