Once the toast of the town, Lady Angelina DeBrooke is no longer known just for her exquisite beauty, but more for her notorious marriages. Dubbed the Dark Angel, she has fallen in love for the first time and wishes to marry, but fears finding herself a widow for the third time. With two poisoned husbands and a cloud of suspicion hanging over her head, she turns to the only man in England who might help her. Benjamin Wallace, Lord Heathton, isn't interested in playing detective again, but when Lady DeBrooke approaches him in a quest to clear her name, he cannot refuse.