The film tells the true story of Christopher McCandless, who, after graduating from college in 1992, decided to leave his life behind and take a trip to Alaska. He spent four months camping in the wild.
Keener (Capote, The 40 Year-Old Virgin, Being John Malkovich) will play a woman who picks up the hitchhiking Vaughn (Dodgeball: A True Underdog Story, Wedding Crashers) when his car dies on the road.