Two lady sleuths for the price of one. It wasn't love that made Rosemary follow Desmond to New York City; it was curiosity, and everyone knows the old saying about how curiosity killed the cat. When the newest object of Desmond's affections, spunky speakeasy proprietor Imogene Quinn, invites them all to an estate auction at a Fifth Avenue mansion, nobody expects a priceless couture dress to be stolen or for one member of the household to turn up dead! The case becomes doubly confusing when it turns out everyone had the means, motive, and opportunity to commit the crime - and furthermore, they all have airtight alibis! Good thing old Des has excellent taste in friends; his new American chum has a few tricks up her sleeve, perhaps even as many as Rosemary. Our intrepid lady sleuth will have to join forces with her American counterpart when she's compelled to unravel the mystery and solve the case.