Autumn, 1830. Lilian Westmorland, the spirited young heiress to an estate in England's West Country, has only narrowly survived a devastating riding accident. Her guardian thinks it best that she travel to Egypt, where the warm climate might help her recover. But Lord Ambrose Malfine fears that her trip may pose even more danger to his young neighbor, the daughter of his late friend. After her departure, he hears of strange things happening one after another, including the death of a little girl. Compelled to rescue Lilian from danger, Ambrose races to Egypt, where, among Cairo's labyrinthine streets, he uncovers unspeakable evil.