The film is adapted from a true story, showing the legend of an idealist and a story of wandering. Christopher (Emile Hirsch) comes from a wealthy family and is an excellent student at Emory, a prestigious private school in Atlanta, with a bright future. However, after graduating from school, he chose a completely different life, gave up his enviable job, donated his savings to charity, and went to Alaska to find himself. Amid the dissuasion of his family, he embarked on a long and slow journey back to nature and became a veritable wanderer. Along the way, he met many people and suffered the challenge of survival in the wild several times. Every step was full of hardships. With his tenacious perseverance, he realized his dream of finding himself...