As the daughter of a marquess, Lady Marian Russell is poised to impress in her first London Season. She is young, beautiful, and wealthy—but catching an eligible husband is the last thing on her mind. Marian is disillusioned with how the upper class lives while the poor of London suffer, and she is determined to right this imbalance. When she comes face-to-face with a mysterious man who steals from arrogant aristocrats and redistributes the spoils to the poor, Marian recognizes a motivation that mirrors her own. She is determined to discover the true identity of the unscrupulous hero and offer her assistance.

When she unmasks the bandit, however, Marian is stunned: he is none other than the elusive Lord Robin Loxley. In exchange for her silence, Robin begrudgingly agrees to train the lovely Marian in the art of thievery, quickly realizing that his heart may be stolen next. But when Robin and Marian discover a copycat thief operating in London, they are faced with a foe whose purpose is far from noble. Amid distracting suitors, becoming champions of the poor, and a growing attraction they can't ignore, can they expose the renegade pilferer without risking themselves—and each other?