When her husband, Porter, quits his job to hike the 2,663-mile Pacific Crest Trail from Mexico to Canada, Gail Storey refuses to let him go alone. Gail, fifty-six at the time, was not a hiker and was terrified of leaving behind their comfortable Houston home for life on the trail. In the end, the trip tested and deepened their relationship, with each walking into the question Who am I?