Arranging an engagement to the infuriating Captain Harry Cathcart in order to escape her extradition to India, Lady Rose Summer finds the agreement complicated by a friend's untimely demise, a murder Rose's intended helps her to investigate.

Wayward Edwardian debutante Lady Rose Summer becomes the prime suspect in the killing of Dolores Duval, the seductive new client of her fiancé, Captain Harry Cathcart, after a fit of jealousy leads her to threaten the woman.