After an odd encounter at a grand masquerade ball, Lady Emily becomes embroiled in the murder investigation of one of the guests, a sometime actress trying to pass herself off as mysterious heiress and world traveler Estella Lamar. Each small discovery leads to more questions. Was the intended victim Miss Lamar or the imposter? Who would want either of them dead? Soon, a larger puzzle begins to emerge: No one has actually seen Estella in years.