Elizabeth, Lady Beauchamp, fears for her life. When she discovers her dissolute and long-estranged husband has syphilis—and he wants to beget an heir no matter the cost—she flees to a remote part of Scotland to begin a new life as the widowed governess, Mrs. Beth Eliott at Eilean Tor Castle. When Mrs. Eliott unexpectedly arrives on his doorstep, the reclusive and recently widowed Marquess of Rothsburgh is both irritated and intrigued. No longer in need of a governess—his young daughter now resides with his sister's family—he proposes the beautiful widow fill a position of a different kind.

Graham, Lord Blakemore, was believed to be lost at sea as a boy. While his mother, Lady Agatha, has never given up hope of finding her son again, others - eager for the title and the wealth that accompanies it - have been conspiring to have him declared dead against Lady Agatha's wishes. Her only ally in the house is her late husband's ward, Miss Beatrice Marlowe. But when a dark-haired stranger arrives on their doorstep claiming to be the lost heir to Castle Black, the plots and schemes of those who would have the castle for themselves take a dark and even more sinister turn.

All Lady Victoria Kirby wants is to dig in the dirt, take notations, and record history, thank you very much. Bumbling through ballrooms and getting disdained by the ton for her less than ideal looks, on the other hand, is the last thing she wants. But her reckless father has a different idea for her future when he puts up the ultimate ante - her hand in marriage - and loses. Over her dead body.

When a beautiful stranger ducks into his bookshop during a rainstorm, Cale Cameron, well-known rake, is instantly attracted to her. Elizabeth, Lady Thornhill, is restless and hungers for something she cannot name. Society would never accept a countess and a mere bookseller, so they agree to a one week affair to indulge their desire. As their passion ignites and their connection grows, Elizabeth threatens the one thing Cale has protected above all else—his heart.

Lady Ludmilla Windmere is mortified. The spinster extraordinaire has fallen in love with her best friend, and that cannot be. The problem? She hasn't met him. Not once. For they have only ever corresponded by letter. When she sets out to uncover his identity, her world shatters. For Addy turns out to be none other but London's worst rake. Adrian St. Addington is perturbed. The rakehell extraordinaire is developing a marked tendre for a spinster, and that cannot be. The problem? She might be mistaking him for someone he is not. Or, what is worse, know precisely who he is.