Aziraphale and Crowley's friendship is tested to the limit as their superiors catch up with them. Armageddon starts in earnest, with the Antichrist's powers wreaking havoc across the globe.

Aziraphale and Crowley race towards Tadfield airbase as they attempt to prevent Adam and the Four Horsemen from beginning the apocalypse. But one has been discorporated and the other is trapped in a flaming motorway. Will they get there in time?

Can Adam, Crowley and Aziraphale work together to fight the powers of Heaven and Hell and prevent the apocalypse? And what fate awaits them if they do? The story reaches its conclusion, and it might just be the end of the world.