Exchanging vows of love with sailor Frank Aldersley the night before his departure, Clara Burnham is haunted by the memory of Richard Wardour, and his mistaken belief that they will one day marry. With her gift of 'Second Sight', Clara foresees terrible tragedy ahead and is racked by guilt. Allied to two different ships, the two men at first have no cause to meet - until disaster strikes and they find themselves united in a battle for survival. It cannot be long before they discover the nature of their rivalry.