Watch Once Upon a Prince for Free: How to Stream the Movie Online at 123Movies. . Susanna gladly accepts help one day from handsome stranger Nate at her parents’ garden store in small-town Georgia. Sparks between them fly, but when a photo of them gets leaked to the press, Susanna is in for the shock of her life when Nate is called back home by his mother… For his coronation as the King Nathaniel of Cambria!