For Green Beret Travis Chapman, special operations and covert missions are his life. When his country calls, he reports without question. Until now. Until he’s tasked with protecting a woman he’d once loved and sent him packing. He’d rather go AWOL than spend time with civilian researcher Claire Reed. Even when he learns that her vital research project is stolen, he thinks twice about seeing her again.

When a local woman goes missing and Sheriff Blake Jenkins delivers her blood sample to DNA expert Emory Steele for analysis, Blake discovers Emory is a dead ringer for the missing woman. Blake’s gut says the woman is related to Emory. But Emory rejects the notion, requiring a DNA test before she’ll concede that she does indeed have a twin sister she never knew about.

Elite Guardians bodyguard/former sniper Christina Sherman has protected uncooperative clients before—but this time, well, her client is bossy, headstrong, and occasionally eats off the floor. Yes, he’s a highly trained military working dog, but certainly her skills could be put to better use, right? Not according to former Special Forces Air Commando Grey Parker. He needs her help to protect his dog while he undergoes an experimental surgery that could restore his ability to walk.

Vanguard technical specialist Simon Olson has spent years working to make up for the mistakes he made. With his twin about to marry the love of his life, Simon has one last job to do, and he’ll be able to let go enough to move on without the past hanging over his head. Too bad it means going to high school for the first time…as a teacher.

EMT Freya Olson has lost her faith, but not her drive to save those who need her help. When the past that her family left behind after her mother's death shows up in Benson, Freya lands on the target list as well. But things aren't what they seem, and Freya’s loyalty will be pushed to the limit.