In four hours, Shelby Jane Cooper will be struck by a car. Shortly after, she and her mother will leave the hospital and set out on a winding journey toward the Grand Canyon. All Shelby knows is that they're running from dangers only her mother understands. And the further they travel, the more Shelby questions everything about her past - and her current reality. Forced to take advantage of the kindness of unsuspecting travelers, Shelby grapples with what's real, what isn't, and who she can trust... if anybody.