It's 1932, a time gripped by crisis and fear, yet the liner RMS Aquitania embodies a world apart, of luxury and refinement. Rowland Sinclair and his companions are on board, returning from overseas. They dine in the chandeliered ballroom with a famous suffragette, a bishop and a retired world prophet, a mystic in a dinner suit whose mere presence is a challenge to the Church. The evening is charged with tension but civility prevails... until people start to die. Then things start to get awkward. And once again, Rowland Sinclair is unwittingly at the centre of it all.