Lord Alexander Pyne-ffoulkes, the younger son of the Duke of Ilvar, holds a bitter grudge against his wealthy father. The Duke intends to give his Duchess a priceless diamond parure on their wedding anniversary - so Alec hires a pair of jewel thieves to steal it. The Duke's remote castle is a difficult target, and Alec needs a way to get the thieves in. Soldier-turned-criminal Jerry Crozier has the answer: He'll pose as a Society gentleman and become Alec's new best friend.

Jasper Detchard is a disgraced British officer, now selling his blade to the highest bidder. Currently that's Michael Elphberg, half-brother to the King of Ruritania. Michael wants the throne for himself, and Jasper is one of the scoundrels he hires to help him take it. But when Michael makes his move, things don't go entirely to plan - and the penalty for treason is death. Rupert of Hentzau is Michael's newest addition to his sinister band of henchmen. Charming, lethal, and intolerably handsome, Rupert is out for his own ends - which seem to include getting Jasper into bed. 

Toby never meant to be a highway robber, but needs must. He didn’t plan to impersonate a top London valet either, but when the chance comes to present himself as the earl of Arvon’s new gentleman's gentleman, he grabs it. Unfortunately, the earl is the man he seduced and robbed on the road to get here. Oops.

Robin Loxleigh and his sister Marianne are the hit of the Season, so attractive and delightful that nobody looks behind their pretty faces. Until Robin sets his sights on Sir John Hartlebury's heiress niece. The notoriously graceless baronet isn't impressed by good looks, or fooled by false charm. He's sure Robin is a liar - a fortune hunter, a card sharp, and a heartless, greedy fraud - and he'll protect his niece, whatever it takes.

Sir Philip Rookwood is the disgrace of the county. He's a rake and an atheist, and the rumors about his hellfire club, the Murder, can only be spoken in whispers. (Orgies. It's orgies.) Guy Frisby and his sister, Amanda, live in rural seclusion after a family scandal. But when Amanda breaks her leg in a riding accident, she's forced to recuperate at Rookwood Hall, where Sir Philip is hosting the Murder. Guy rushes to protect her, but the Murder aren't what he expects. Sir Philip turns out to be charming, kind - and dangerously attractive.