Although Colin Rosemoor's reputation for fast living is well earned, he is not guilty of cheating at cards, a charge that casts him from polite society. Since his accuser has convinced the lady Colin planned to marry of his guilt, Colin enlists the help of his friend, Hugh Ballard, to win her --- and his honor --- back. Yet a chance meeting with Hugh's long-lost sister may change everything. An exceptionally intelligent Highland lass with an interest in astronomy and an independent streak, Brenna Maclachlan is wholly unique --- and therefore irresistible.