Britain's war in Afghanistan has cost more than 300 soldiers' lives and billions of pounds, and left thousands wounded. The effects on those who serve are profound, just as they are for the loved ones who wait at home. This programme follows A Company, 2nd Battalion the Yorkshire Regiment for a year - before, during, and after their tour in Sangin, probably the most dangerous place in Afghanistan. The result is a searing and intimate portrait of a British community at war in Afghanistan and on the home front.