Kate Duncan agrees to help her young cousin land a husband though she draws the line when she learns the foolish girl wants to use an apothecary's love potion to snag the notorious Marcus Pelham! To prove the elixir a fake, Kate drinks it herself-and experiences the most erotic moment of her life when she stumbles upon Marcus in a most compromising position. Every nerve in Kate's body sings as she watches from the shadows, but is her response a result of the potion...or the man? Luckily, Marcus is far too busy to notice Kate's spying-or so she thinks...

As the Earl of Stamford, Marcus has his choice of willing ladies to share his bed. Yet nothing has ever aroused him as much as the image of Kate watching him. Marcus tries to have a little fun with Kate by drinking the elixir-and then appearing to lose all control every time she's near. But the prank goes awry when Marcus finds himself wildly and truly attracted to the innocent Kate. As he teaches her the passionate art of seduction, will he lose his heart for the very first time?