Bombay, 1909. Genevieve Masefield and George Dillman make a living as detectives aboard the early twentieth century's most extravagant ocean liners. From the members of first class in all their finery, to the card cheats and pickpockets plying their trade, they've experienced more than their share of humanity. And the Salsette boasts a group of travellers whose lives are set to intersect in ways none of them could have foreseen on dry land - including in a murder. Dillman and Masefield know that nothing in the cloying, claustrophobic confines of an ocean liner is as straightforward as it seems, and as the ship inches toward port relationships on board, both those in plain sight and some hidden from view, will be revealed. But will the exposure of an intricate web of deceit lead George and Genevieve to the killer?