Tristan Gilbert, the autocratic Duke of Kendall, has a clear plan for his future-destroy his father's memory, obliterate his enemies, and become Prime Minister. Fortunately, he can accomplish all three goals by convincing Parliament to prosecute the Scottish Earl of Hadley. Once Hadley is vanquished, surely the Queen will recognize Kendall's readiness for the role of Prime Minister. But in order to succeed, Kendall must first conquer his own unnerving attraction to Hadley's hoyden of a daughter-Lady Isolde Langston. No matter his efforts, Lady Isolde lingers in his blood, a sort of love-potion madness Kendall struggles to suppress.

Lady Isolde Langston knows impulsivity will be her downfall. Case in point, her heedless actions triggered the Duke of Kendall's current vendetta against her father. Isolde needs to right the wrongs she caused and force the duke to surrender before Hadley ends up jailed. To do this, she decides to torment Kendall at every turn-at balls and musicales and even in his own library. The arrogant Sassenach will rue the day he crossed her.

But when an unfortunate accident fractures both their lives, Kendall and Isolde unexpectedly face a future neither of them wished. Adrift, they are forced to call a truce. As their romance deepens, can Kendall change his heart sufficiently and Isolde forgive past hurts in order to form a love all their own?