In the first five years since the Iraq War began, soldier arrests in the city of Colorado Springs tripled. At least 36 servicemen based at the nearby Army post of Fort Carson committed suicide. And 15 Fort Carson soldiers were charged or convicted in at least 11 killings. Many of the most violent crimes involved men who had served in the same battalion in Iraq. Three of them came from a single platoon of infantrymen. FRONTLINE tells the dark tale of the men of Third Platoon, Charlie Company, 1st battalion of the 506th infantry and how the war followed them home. It is a story of heroism, grief, vicious combat, depression, drugs, alcohol and brutal murder; an investigation into the Army's mental health services; and a powerful portrait of what multiple tours and post-traumatic stress are doing to a generation of young American soldiers.