This opening part of the series tells the story of a close-knit group of friends from 3 Platoon, 1st Battalion Royal Anglian regiment, who were sent to Helmand province in 2007. For most of them it was their first experience of war. The whole tour was filmed on a helmet camera by the platoon's sergeant, who captured the moment when one of his men, 19-year-old Private Chris Gray, was killed in a Taliban ambush. The film explores the effects of his death on both his mates in the platoon and his family back in the UK.