After being left at the altar by a "former" rogue, Meredith Merriweather begins to pen a cautionary guidebook to prevent her misfortune from befalling other young ladies of Society. After conducting social experiments on various former cads, bucks, dandies and lechers, she targets London's most notorious (supposedly reformed) rake and sets out to prove the adage, "Once a rake, always a rake"--even if she has to dangle herself as bait to do it.