Although Celeste Montgomery was forced into a marriage a year ago, her husband is more often gone than home, and she is living a quiet life. Until Investigator Owen Gregory shows up at her home to tell her some outrageous news: Her husband has been murdered...and he was also a bigamist, making her the third of three wives.

When Morgan Banfield wakes up in Newgate after a night of debauchery, the last thing he wants to see is his estranged brother. But in exchange for his help, Morgan must agree to take on responsibility and try to get his life together by taking on the job of Man of Affairs for a friend. The last thing Lizzie Margolis wants is some rogue coming onto her brother’s staff. She’s had enough of rakes after being ruined by one years before. But the more she gets to know Morgan, the more drawn to him she becomes. 

The wild and charismatic Duke of Abernathe is the kind of friend anyone would wish to have. He even formed the 1797 Club, consisting of 10 men who would all be dukes. But he has full-throatedly declared he will never marry and no one understands why. But Miss Emma Liston doesn't care why. A longtime wallflower with an absentee father who is a scandal waiting to happen, she needs to marry. Now. She decides to take a wild chance and ask the help of her friend Meg's brother James.

For years Serafina McPhee has been engaged to marry the heir to the duke of Hartholm; and for almost as long, she has been struggling to find a way out of that engagement. When he suddenly dies, she does not mourn but thrills at the idea that she will be free. Unfortunately, best-laid plans go awry when the next in line for the title, her intended's cousin, Raphael "Rafe" Flynn, is forced to take over the engagement. But Serafina knows Rafe's reputation as a libertine and wants nothing to do with him, either, even if he is devastatingly handsome.

Jude Samson has worked for the Woodley family for such a long time that he is seen as a brother. But he has very unbrotherly feelings toward the youngest of the clan, Lady Audrey. When they find themselves off at the family's country estate, long simmering desires will come to the forefront and Jude won't be able to stop himself from taking that one, oh-so-forbidden taste.

Spirited debutante Lady Olivia McLeod, cherished daughter of the Duke and Duchess of Strathaven, has two interests: solving mysteries and winning the love of her rescuer and secret crush, the infamous Duke of Hadleigh. When Livy joins Lady Charlotte Fayne's charity for young ladies and discovers that it is a front for a covert investigative agency, she is thrilled. Livy dedicates herself to solving a deadly case. Little does she realize that the path to danger will also lead to her heart's deepest desire.

When Miss Elizabeth Waterstone encounters the enigmatic Duke of Diable Delamere in the most shocking of circumstances, she is determined to exploit his rakish expertise to the fullest extent. The duke agrees to teach her everything she needs to know, but in return expects to receive her unwitting cooperation to uncover an assassination plot against the monarchy. But Elizabeth is hard to deceive, and the duke finds himself needing more than her innocent skills in his bed.

Widow Rosalinde Wilde is on her way to her beloved sister's wedding when an unexpected storm waylays her at an overcrowded inn. There she meets a tempting stranger who sweeps her into a night of unforgettable passion. Grayson Danford never expected a night with the irresistible Mrs. Wilde, but she was a welcome distraction from the unpleasant duty of breaking up his brother's impending nuptials. He's shocked when he discovers his passionate lover is none other than the sister of his brother's intended.

Lord Sebastian St. John, dedicated bachelor and a co-owner of Fallen, the most scandalous pleasure club in London, is known as Sin for good reason. Orphaned by a shocking accident, Sin long ago vowed a life of solitude and decadence. Yet when Lady Grace Carrington begs for his help destroying her reputation, Sin can't turn the ton's most proper lady away.

When the Jasper Kincaid, the Earl of Harcourt, offered to marry one of the infamous Shelley triplets, he was doing it for the dowry to refill his depleted coffers, not for anything so silly as love. But when he realizes it is Thomasina Shelley masquerading as his fiancée at their final engagement ball, not his true intended, a desire for her that he has been ignoring sparks. And when it becomes clear her sister has run away with another, an opportunity arises for a marriage with a much deeper connection.