The new Duke of Torringford must take a wife in three weeks or lose the country estate he's unexpectedly inherited. His brother suggests an advertisement in the papers, but the Duke refuses to consider it - until a wine-fueled evening when he pens one in jest. Now with the ad printed, the Duke is mortified - but that's when the lovely Miss Penelope Hastings enters his life.

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.

Rich, handsome, and fashionably jaded, Jason, Lord Radford, knows he must marry to get an heir, but assumes that any well bred young lady will do, so he offers for Caroline Hanscombe, whose name he draws at random. Caroline is pressured by her family to accept, but shy and musical, she finds her new fiancé alarming. Will this be a match made in heaven or hell? Or might Caroline quietly find herself a man who suits her better?

Turned out by his father after a tragic scandal, Lord Michael Knightly has grown into a powerful, but self-made man. With the whispers and stares that still follow him, he's been shut out of respectable society. He would rather be anywhere but London. Then he meets Lady Aldora, a young woman who mistakes him for his brother, the Marquess of St. James.

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.