Lady Rose Summer, the wayward Edwardian debutante who keeps getting mixed up in disreputable adventures, would swear she is not a jealous woman. After all, she knows her engagement to private detective Captain Harry Cathcart is only a ploy to keep her parents from shipping her off to India to find a husband. But then Harry's latest client Dolores Duval-- a vision of curves with a seductive parisian accent starts appearing everywhere at his side. And that changes everything. In a fit of rage, Rose threatens the French siren only to be found the very next day standing over her dead body. Can Harry clear her name and put the real murderer behind bars?