The Earl of Wentworth has a fiery and unpredictable temper and is about to fight a duel in Hyde Park with a Frenchman who has insulted him, when he is restrained by his friend, Sir Thomas Babbington, and a helpful policeman. At the same time, Temia Brandon is returning home from her finishing school in France and is longing to see her horse, Lightning. emia discovers that her father has been hiding a dark secret for many years and is now being blackmailed by the odious Lord Alphonse, who threatens to reveal the secret and ruin the family’s reputation. Lord Alphonse proposes to Temia with her father’s approval, so she runs away from her home in Northamptonshire to London. Temia’s and the Earl of Wentworth’s paths cross, and then Sir Thomas Babbington unexpectedly falls in love with her.