Juliet Graham fervently counts the days until her twenty-first birthday, when she can claim the inheritance that will grant her the freedom she has always craved and the guardianship of her younger brother. Until then, she is trapped under her aunt Agnes's domineering will. When forced to accompany the family to a house party at Shaldorn Castle, Juliet's only objective is to keep to herself. That is, until a chance encounter with a boorish stranger stirs up an unexpected whirlwind of emotions in her. Thrown off-balance, Juliet does the unthinkable: loses her temper and insults the man—who turns out to be her unwilling host, the Duke of Halstead. Fully expecting to be sent away, Juliet is surprised when the brusque and callous duke instead takes an interest in her.

Drawn to the duke in unguarded moments, Juliet finds herself more and more intrigued by the man who shuns Society's rules as completely as she does, and over the next few weeks, their unlikely friendship deepens into a connection neither expected.

But even as Juliet comes to recognize her true feelings, her scheming aunt issues an ultimatum that threatens the future she was just beginning to hope for. Juliet must choose: either break the promise she made to herself years ago, or lose the man who has captured her heart and soul.