Its 1931. The new luxurious transatlantic liner Empress of Britain is on her eastward passage. Among the first-class passengers on board are two English confidence tricksters making a discreet exit from a scam they have left behind them in the United States. A chance meeting on deck brings them a tempting new target in the shape of the beautiful & wealthy heiress Diana Charnwood. Its a trick theyve pulled before with some success. Charm the daughter into an engagement to marry then get the father to buy you off. So confident are they of success in fact that they make a pact: whichever of them wins Diana Charnwoods love will share his fortune with the other. But a violent death is to interrupt their neat little scheme. & they find themselves stumbling into something much darker than either had suspected...