Caroline Hayward, the Duchess of Browning, is married to a man thrice her age who considers her lower than the servants while he parades his mistress in front of her. Feeling unworthy of love, Caroline finds comfort with her son, Oliver. Philip Butler is the gardener of Blackwood Estate, a quiet man who admires from afar the strength Caroline possesses. Although he wishes to stop the cruelty her husband inflicts on her, Philip knows his place in society keeps him from intervening. Upon the death of Caroline's husband, however, Caroline asks Philip to be her protector, for there are those around her who seek the wealth she has acquired, giving him the chance to be in her presence more often than he could have before.
With the passage of time, Caroline realizes that her feelings for Phillip are changing, and she begins to wonder if love can be found after all. Yet, although he sees the look of yearning she carries, Philip knows all too well the risk of falling in love, and he does what he can to temper what is rising within himself. When Oliver is kidnapped and held for ransom, Caroline sends a desperate letter to the Duke of Ravens, a man of legend known for tracking down those who took his wife. When the Duke refuses, she turns to Philip for help. As the two set off to retrieve her son, Caroline questions those she once trusted and begins to worry that her enemies are much closer than she first thought. Will the strain of hunting down the kidnappers bring the two together? Or will it drive a wedge so deep it tears them apart?