Head of the Denver Pinkerton office Archie Gordon has been tasked with hiring female agents. The problem? They need to be trained by existing agents while solving cases. Alone and unchaperoned. In 1871. The solution? Have each pair marry temporarily, for the duration of the case. If Archie can convince his reluctant agents and the even more reluctant women to agree, that is.

Sabrina is running from her past. Sabrina Jones never expected to be set free from her life as a saloon girl. Thanks to a gift from Rand Ketcham, a notorious bounty hunter, she was able to leave her old life in the saloons. Colorado was where she wanted to go. What to do was still a mystery, until she reached Denver and saw an ad in the paper for women to apply as Pinkerton agents. She figured she'd be good. All those years in the saloon had taught her how to read people. That ought to come in handy as a detective.

After losing her fiancé to a terrible accident, Miss Katherine Blackmore found contentment as a matchmaker to the members of Society. Working alongside her sisters, they strive to secure the most unlikely people with love matches. Everything is perfect until an infuriating lord steps into her office, turning her world upside down. Edward Simpson, the Marquess of Berkshire, has a problem. His sister needs to marry, and quickly. When he approaches Miss Blackmore to hire her services, he does so poorly and ends up soundly insulting her. Luckily, he fares better with his second attempt.

She's on the run from her cruel guardian... And Miss Adelaide has found the perfect hiding spot in the home of the formidable Earl of Tolston. But masquerading as a maid comes at a cost. One day she faints on the job, and when she wakes... She's in the arms of the Earl. His eyes are dark as he glowers down at her, but then he says, "What are you hiding, little one?"

Miss Lizette Kent's life is in shambles. Not only did her mother just pass away, but she has been left without the means to provide for herself. While she is contemplating her future, she encounters an unexpected and vexing man: Tristan Westcott, a man that mistakenly seems to believe that she is the daughter of an earl, despite her insistence that she is not.