Detective Darin Callahan needs to find his partner's killer. His new partner Detective Gina Carlson is only too willing to help out, as she needs to get closer to the cop IA has sent her to investigate. Did the tall, green-eyed Texan kill his partner, or is he the hard-working, honest family-values man he seems to be? Going undercover as man and wife seems to be the best way to find out-until Gina's past catches up with her. Can she put her night terrors aside and take down the biggest drug lord in Houston? Can Darin help her overcome the traumatic memories of her childhood? Or will their undercover operation be blown and their fledgling faith and trust in each other destroyed when Darin finds out Gina has been sent to investigate him?