She is jealous of a man who is not hers.

Caroline Lloyd, the English daughter of Lord Lloyd, has only heard whispers of the brutish Highlanders of Clan Campbell—the sworn enemies of her people. As the war against them drains her father's resources, there's but one solution: a marriage between Caroline and the clan's fierce leader, Laird Aodh Campbell.

Yearning for an English lord, Caroline feels she's sacrificing her dreams for a Highland savage. Meeting Aodh only confirms her fears; though young and built like a warrior, his lack of manners promises a miserable union. Yet, he seems to despise her just as much.

Desperate to avoid this fate, they devise a daring plan: a false betrothal and wedding, a ruse to bring peace until the war subsides. But as they play their parts, Caroline glimpses a different side of Aodh—his unwavering love for his people stirs something unexpected within her.

Then, an unsettling truth surfaces: Aodh was already betrothed to a Scottish lass, and their secret meetings ignite Caroline's jealousy. Bound by their own deception, she can't voice her anguish. And when the facade of their marriage begins to crumble, enemies close in, ready to use their lies against them.

Amidst treachery and growing danger, Caroline and Aodh must unite to undo the harm they've caused. But after betraying everyone—and each other—can they learn to trust again? And will their hearts allow for something more?