The discovery of a long-lost love letter in a house she's redecorating sends Rosalie Stanton on a quest to find its rightful owner. Since his return from the Great War, William Cavendish has lived as a recluse. His peaceful existence is shattered by the return of the letter that once held all his hopes -- and by its bearer, the irrepressible Rosalie, who bears an uncanny resemblance to his lost love. As Rosalie sets out to lure William back into society, she realises that in him she might just have met her match.