"A Second Knock at the Door" offers a rare glimpse into the lives of military families dealing with the loss of loved ones to friendly fire. Through interviews and investigative reports, this film explores key incidents that forced families of the fallen to embark on individual but integrally linked quests for the truth as the Army attempts to bury the truth within the "fog of war."

Friendly Fire (as defined by the Department of Defense): "A circumstance in which members of a U.S. military force are mistakenly or accidentally killed or injured in action by U.S. forces actively engaged with an enemy." The Army's Promise: To tell families "the truth, as best we know it, as fast as we can." They are not fulfilling their promise. A SECOND KNOCK AT THE DOOR.