Under attack from all sides, UNIT in Britain is in disarray. It faces a stark choice - to close its doors and concede defeat, or to fight back, whatever the cost… and the injured Colonel Emily Chaudhry knows UNIT has never backed down from a battle... If UNIT is to fight back, it's going to need the services of its missing commander, Colonel Brimmicombe-Wood, and the experience of the Brigadier, who can never refuse when duty calls...