Will Zachary and his dementia-stricken uncle lead an isolated existence running The Flying Z, a struggling, southern Arizona ranch on the Mexican border. Their ordered life dramatically changes when Merry O’Hara, driving cross-country on her way to grad school at Stanford, drives into a ditch on their land…and right into the middle of the war they’re waging against a vicious cartel smuggling drugs across the ranch. Against all odds, Will and Merry are drawn to each other, at the same time they’re desperately fighting, out-manned and out-gunned, to protect the ranch and their lives.