In a steel-lined basement in a near-future Thursday morning, Conor and Julia are waiting for the world to end. She has spent her life plagued by visions of darkness and today is the day when, according to her dreams, Britain will be wiped out by a nuclear strike. No one but Conor has ever believed her. They have prepared to spend years underground together, waiting for the radiation to clear and dreaming of the world they will rebuild when they emerge. But as the moment of truth draws nearer, doubt begins to seep into the airless room.