A fractured couple, and a twisted killer. Derek "Slater" Banez was a military lifer, until PTSD got the better of him. After quitting his black ops career with MIT, the bureau offers Slater a position in Utah as an FBI training instructor. When he runs into Kathleen Quinn—the love of his life—Slater will be placing everything he holds dear on the line. Except she's no longer the woman he used to know. Kat fell hard for the deadly sniper but when he betrayed her trust, she walked away. Now Kat holds dangerous secrets, and keeping the man who destroyed her heart on the periphery is the least of her problems. When a ruthless serial killer sets his sight on Kat, Slater will put his own life and career on the line. Can Slater keep Kat alive, or will he place her and his former MIT team in the crosshairs of a determined killer?