Woman fishes a nearly unconscious man out of the ocean. When she realizes he has lost his memory, she tells him she is his wife. It sounds perfectly plausible to him and he settles into his life, running off the suitor who was causing the woman so much trouble. 
 But he has another life. He's a duke and his friends are searching for him, but that is only a part of who he is. He'd been raised in India and was half-Indian. Throughout his life, he'd faced prejudice. It had lead him to be a strong man who would do as he pleased. 
 With his memory slowly returning and his friends discovery of him, he returns to London, with his "wife" by his side . . . now his "fiancee". Things don't go perfectly smoothly, however, as the person who had attempted to kill him in the accident that ended him up in the sea, tries to finish the job. Luckily, the woman helps out and they live happily ever after, or so one would assume.