When Lady Henley Killigrew's father dies and his title of earl passes to a not-so-friendly cousin who wants her and her two younger sisters out of their elegant London townhouse, she takes them to Moonstone Cottage, a lovely manor house they inherited from a maiden aunt in the Cornwall seaside village of Moonstone Landing. But their funds are limited, and the new earl is a stingy guardian who will not loosen the purse strings to allow her to properly maintain herself and her sisters in their new home. The only way to save them all is for her to marry.

Rumors abound about the rakish Viscount Rochford, a man who’s left a trail of wailing hearts in his wake. With a reputation for jilting society women, the ton can scarcely believe he is ready to settle down and wed. Neither can Miss Penelope Stratton. With her enviable looks and sizable dowry, this shy country girl finds herself with an impressive list of suitors. Yet against all her better judgment, she is drawn to the one man least suited to matrimony; a notorious man with a scandalous past.

Lady Emmaline Fitzhugh, a hopeless romantic, is tired of sitting with the wallflowers, waiting for her betrothed to come to his senses and marry her. When Emmaline reads one too many reports of his scandalous liaisons in the gossip rags, she takes matters into her own hands.

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.

For too long Miss Emily Parr has been subject to the whims of her indebted uncle and the lecherous advances of his repulsive business partner. Her plan to be done with dominating men forever is simple: find herself a kind husband who will leave her to her books.It seems an easy enough plan, until she is unexpectedly abducted by an incorrigible duke who hides a wounded spirit behind flashing green eyes.