When allied forces begin to return home from Afghanistan, the Taliban start taking back parts of the country. A small team of British military are sent out to prepare for a possible evacuation.
As British troops prepare to evacuate Kabul, the Taliban take the city, unleashing chaos on the airport runway. The evacuation can't begin until the military clear the airfield of the thousands of panicked civilians who've broken through.
British troops rush to deal with the aftermath of a deadly explosion at Kabul airport and must stop processing civilians as they have to start extracting their own forces out of the country.