Angie wonders what her life would be like if she had married a former boyfriend who became a famous sportscaster. She takes the train home to spend Christmas with her family and inexplicably finds herself 10 years in the past. With the advice of the train's enigmatic conductor, Angie has the chance to revisit that Christmas and learn what — and who — is truly important to her.

Liberty, a socially awkward 16-year-old, returns from two months at camp to a blindsided introduction of her mother’s fiancé, John Smith, whose charm, intelligence, and beauty paint the picture of a man too perfect to be human.