It's Derby day at Epsom Downs, and Lord Charles Sheridan is on hand to photograph the race with his new camera-while his wife, Kate, watches from the stands. It's a thrilling day for both Sheridans-until the race ends with a jockey's death. With her husband busy investigating, Kate retreats to the countryside to interview world-renowned actress Lillie Langtry for a magazine article. Plunging into her subject's less-than-illustrious past, Kate puzzles over the long-ago theft of the actress's jewels-and is not surprised when Charles's investigation heads in Langtry's direction. Now, sorting through rumors of bitter rivalries and torrid love affairs, the lord and his lady embark on a race for justice that stands to be a photo finish...