Lucy Hardgrove lands the job of a lifetime when she's hired to pen the script for a remake of the beloved holiday movie, 'His Merry Wife'. First filmed in 1947 at beautiful, historic Biltmore House, it has long been considered a Christmas classic. When the head of the studio isn't satisfied with the ending Lucy writes because it deviates from the original's feel-good conclusion, he sends Lucy to Biltmore Estate for research and inspiration. While there, she unwittingly discovers the ability to travel back to the 1947 set of the movie through the help of an hourglass. After shaking off the initial shock of this turn of events, Lucy embraces this as her chance to uncover the truth about the movie's original ending. While on set, she and Jack Huston, one of the film's stars, spend time together and become close. But her sudden appearance has set off a chain of events that put the production in jeopardy. Before she can return to the present, Lucy must make things right or threaten to alter the future forever.