'From The Mekong to Montana' traces one effect of the Vietnam War on an American woman. Diane Steffan married her college sweetheart in 1970. More than ten years later her husband suddenly developed Post Traumatic Stress Disorder from his service during the war. Their life together crashed into the chaos of violence and alcoholism, which eventually claimed his life. Fifteen years after her husband's death, Diane visits Vietnam to see for herself the country that changed her life.