We follow Aziraphale and Crowley's friendship across the ages. Meanwhile, in the present day, Agnes Nutter's descendant Anathema arrives in Tadfield on her own mission to save the world.

Aziraphale’s good deed of picking up a hitchhiker on his way back to Soho, proves to be a serious mistake. In 1941 Crowley and Aziraphale encounter some surprising adversaries, old and new, as the Nazi spies who almost entrapped Aziraphale return as Zombies from the dead, intent on preventing him from attempting a Bullet Catch on the West End Stage.