Thea Knight loves a spot of mischief. She especially loves her current mischief: masquerading as her sister, while finalizing her scheme to expose the dastardly knaves whose lies ruined her life. Then big, bad-tempered Lord Luxborough upends her game by maneuvering her into marriage. But it's her sister’s name on the license, so the marriage won’t be valid. Thea’s idea? Keep pretending to be her sister until she can run away.

Jasper Sutton—London’s most dedicated scoundrel—needs a wife, and he needs one quickly. He needs one yesterday, in fact. His requirements are precise: she must be capable of mothering the wild twin daughters who have unexpectedly appeared in his life, and so must possess the patience of a saint and the understanding of an angel. Better still if she is plain and has no expectation of a true marriage. He is not about to reform his ways.

England, 1865: Newspaper columnist Lady Katherine Bascomb finds herself the subject of speculation when her latest article leads to an arrest in the murders plaguing London. The English believe women ought not to write about such vulgar things as crime, and a particularly attractive detective inspector is incensed that she's interfered with his investigation. To escape her sudden notoriety, Katherine heads to the country - only to witness a murder upon her arrival.

Lady Calliope Manning is determined to punish the man she holds responsible for her beloved brother’s death. She will do anything in her power to destroy him. When rumors swirl that the Earl of Sinclair requires a wealthy bride to rescue himself from dire financial straits, she seizes the opportunity to ruin him at last..

Lord Lysander Blackstone, the stern Duke of Montcroix, has only one interest: increasing his considerable fortune. After a series of betrayals, he keeps his emotions buried deep. Money, after all, can't break a man's heart—or make promises it can’t keep. But when his reputation for being heartless jeopardizes a new business deal, he finds himself seeking a most unusual—and alluring—solution.