After her sister and brother-in-law's tragic deaths, an American woman who is the guardian for her young niece and nephew is invited to a royal European castle for Christmas by her late brother-in-law's father, the Duke of Castlebury. Feeling out of place as a commoner, she is determined to give her family a merry Christmas and surprises herself when she falls for a handsome prince. At the invitation of an estranged relative, a young woman travels with her niece and nephew to a castle in Europe for Christmas, where she unwittingly falls for a dashing Prince.