It's May 2009 and a Welsh Guards platoon deep in Taliban country falls into a deadly ambush, just yards from the isolated mud fort which is their patrol base. Seven Platoon is led by the regiment's brightest young officer, Lt Mark Evison, who keeps a candid war diary revealing dangerous shortages of manpower and equipment. They are just two weeks into their tour of duty, and already a vital piece of equipment - an essential radio cable - has failed. As the Taliban tighten their noose around Seven Platoon, putting IEDs on the roads and attacking their small fort, even the most vital spares cannot get to them quickly. This film tells the gripping story of how the lack of one small cable has lethal consequences and leads to a platoon of the Welsh Guards' toughest soldiers nearly being massacred.