In 1809, Justin St. John returns to England a damaged man. Once in London, he discovers his younger brother and heir has been killed in an accident. The younger man was knee-deep in scandal. He had compromised a young woman of quality a few days before his death. Justin feels he is honor-bound to offer marriage. To wed the woman was only Sensible. After meeting her he realizes she is the woman he had rescued in Hyde Park. Justin fell in love with that woman without knowing her name. He had to make her his wife, but he wonders if she had loved his brother. Can he win her heart? Arabella Kingsley, the eldest daughter of Baron Kingsley, never expected to marry after three Seasons on the Marriage Mart, but she is afraid the scandal will ruin her younger sisters' chances of making a good match. It is only Sensible to accepts Justin St. John's offer of marriage for the sake of her sisters. She discounts the fact she fell in love with damaged man on their first meeting. Then she learns of another woman, Marie Theresa Alvarado-Marques. Does Justin truly love this woman? Is he marrying her out of duty? Is he giving up the woman he truly loves? Can Arabella truly give him up? Does he want her to cry off? Can this marriage be a happy one with such a rocky beginning? Suspicious accidents occurs that could have killed one or the other or both of them. Is someone trying to kill them or are they just accidents? Why? Can they catch the would-be killer or killers before he or she succeeds? Can Justin and Arabella's new found love survive under the strain.