Josh and Sam are two brothers whose mother is about to remarry. The two boys are sent to Florida to live with their biological father. In an attempt to convince his younger brother to run away with him, Josh tells Sam that he is a "S.A.M.", a genetically superior being created for war, and they must flee to Canada to avoid Sam being sent to war in Africa. The boys steal a car and begin a trek to Canada only to find out that the bitter/sweet life at home is much better than life on their own.