An investigation of the massacre of 24 men, women and children in Haditha, Iraq allegedly shot by 4 U.S. Marines in retaliation for the death of a U.S. Marine killed by a roadside bomb. The movie follows the story of the Marines of Kilo Company, an Iraqi family, and the insurgents who plant the roadside bomb.

After a bomb kills their company commander in Iraq, British soldiers Treacle and Shane are ordered to round up suspects and use torture on the detainees. Back home, the press gets the story and the pair achieves instant infamy.