A survivor of the mean streets of London's East End, Selina Blackwell has learned to be a chameleon, and in her current iteration as a fortune-teller, she's able to provide a Season for her sister. Only, Madame Sybila can't be a chaperone, so Selina takes on another identity as the proper Lady Gresham. But when a Bow Street Runner takes too much of an interest in her business, it seems the crimes of her past will finally come to light.
Determined to prove that Madame Sybila is a fraud bent on fleecing London's elite, Harry Sheffield enlists the help of the alluring Lady Gresham in exchange for introducing her to Society's best. With his busy career and aspirations for the future, Harry has no time for marriage, but an affair is just right-until he discovers the lady's disarming secret. Whatever his feelings for her, he can't ignore who she is and who she's been. And when she holds the key to the one case he couldn't solve, he must choose justice or love.