Michael Cromwell (Tim Allen) is a self-absorbed, successful commodity broker living in New York City. Wanting to marry his new fiancée Charlotte (Lolita Davidovich), he needs to obtain a final divorce from his first wife Patricia (JoBeth Williams) who left him some years earlier. Patricia now lives with a semi-Westernised tribe in Canaima National Park, Venezuela. Michael travels there to get her signature on divorce papers, but upon arriving, discovers that he has a 13-year-old son named Mimi-Siku (Sam Huntington).