Into the Wild is a true story about a guy named Christopher McCandless who was missing for two years. Christopher was a graduate from Emory University in Atlanta in 1990. He then cut off with the communications with his family and gave a good amount of his money to organizations. He then left his car and burn what was left of his money. Christopher then had not many resources to live off of. He changed his name from Christopher to Alexander, and he stayed up in South Dakota with a friend named Wayne Westerberg. He lived for about one hundred and twelve days while living off of edible things in the Alaskan Desert. He also kept a journal of his life. He planned to go to the coast but instead he found a deserted bus that he would camp in. He mostly ate off of an Hedysarum alpinum, which was commonly known as an "Eskimo plant". He then had to stop eating them because it was to tough to eat. He then later died from it.
http://en.wikipedia.org/wiki/Into_the_Wild