Vietnam, 1967, and the Australian S.A.S. are sent to assist the American forces. For four friends in the unit, unsure why they are in a war they did not start, their defence is their humour, backed up by bawdy pranks, beer, fights and scorpion racing. But when bullets start to come out of the jungle and the combat patrols become paralysingly real, then the laughter stops and the reality hits them with a shocking impact. Survival becomes the main objective. The film presents the hilarity and horror of the soldiers' situation while aiming barbed sentiments at the politicians who sent them there and then forgot about them, and for this reason was fairly controversial in Australia when it was released.