In the late summer of 1913 the aristocratic young poet Cecil Valance comes to stay at 'Two Acres', the home of his close Cambridge friend George Sawle. The weekend will be one of excitements and confusions for all the Sawles, but it is on George's sixteen-year-old sister Daphne that it will have the most lasting impact, when Cecil writes her a poem which will become a touchstone for a generation, an evocation of an England about to change for ever.