Piper Haines has been a private investigator for most of her adult life, specializing in domestic abuse and human trafficking cases—until the day a case lands on her desk regarding a suspected arms dealer lurking behind the respectable façade of a popular local businessman. With her considerable skills in weaponry coupled with her unorthodox methods, Piper decides it’s time for someone to hang this miserable piece of garbage up by his thumbs—and she’s just the woman to do it.

Kennedy Weston of Armstrong Protection Services is the formidable APS Armory Master, one of the legendary Seven, whose weapons mastery is unparalleled. She’s fascinated by the gorgeous, self-reliant, fearless blonde with stunning turquoise eyes who’s just opened a private investigations office in Whimsy—especially when she finds how much more there is to Piper than meets the eye.

When Kennedy learns Piper has every intention of going after a dangerous arms dealer alone, the butch weapons master promptly loses her mind—then offers her assistance to Piper in the investigator’s quest to take down Jean-Baptiste Legrand. Going undercover for the Bureau of Alcohol, Tobacco, Firearms, and Explosives as a naive human resources specialist, Piper manipulates Legrand into offering her a job at his company, hoping to dig out enough evidence to skewer him to the wall and shut down his arms operation.

But when Piper’s cover is blown and she lands in Legrand’s crosshairs, she realizes sometimes two heads are better than one—and Kenn just might be whom Piper has been looking for in her secretly submissive soul for years. But going up against a dangerous trafficker like Jean-Baptiste Legrand, a man who will do anything to protect his illegal empire, could mean she will lose the very thing she’s always been unconsciously searching for.

Because Legrand won’t stop until both Piper and Kennedy are dead.