The Pacific Crest Trail stretches some 2,650 miles from the Mexican border to Canada. It meanders through the scorching deserts of California, the dramatic Sierra Nevada, the volcanic landscape of Oregon and the vast forests of Washington. Every year scores of hikers attempt to walk its entirety. Four in ten give up in the first month alone and only two in ten will reach Canada. Extremes of heat and cold, the toughness and roughness of the trail and encounters with an assortment of potentially deadly creatures stretch walkers to their absolute limits. It’s a lesson Keith Foskett soon learns the hard way, having to deal with blisters and other physical ailments, as well as his inherent phobia of snakes, spiders, bears, getting dirty and camping in the woods after dark. With the harsh winter looming, he enters into a desperate race against time, facing a dangerous, physical and very real threat to become the last Englishman to complete the greatest long distance hiking trail on Earth.