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.

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?

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.

Crowley becomes a Heavenly bee and learns the truth about the Armageddon sequel. Aziraphale defends his bookshop from Shax's army and reveals his halo, Maggie and Nina become warriors, and Jim the assistant bookseller gets some hot chocolate. Crowley and Aziraphale get to the bottom of the mystery of the Matchbox. The Metatron brings an oatmilk latte, along with a final offer.

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.

Heaven sends the angel Muriel in disguise to spy on Aziraphale and Crowley. Aziraphale drives to Edinburgh in pursuit of his Clue, and learns a little about a lot. The couple’s visit to Edinburgh in 1827 involves graverobbery, a statue and an unfortunate encounter with a vial of laudanum. In the present, Crowley is in charge of the bookshop, and is disappointed by human beings and the weather.

Aziraphale tries to bring Maggie and Nina together by organizing a meeting of the Whickber Street Shopkeepers and Street Traders Association. In Hell, Shax is determined to launch a full scale attack on the bookshop, with a legion of demons at her command. Nina's heart is broken, as is a bookshop window. Gabriel has a close encounter with Mrs Sandwich and a small plate of cakes.

Retired angel Aziraphale and retired demon Crowley’s lives are upended when a visitor arrives on the doorstep of Aziraphale’s bookshop, bringing chaos. Local shopkeepers Maggie and Nina get locked in to Nina’s coffee shop when Crowley loses his temper. Heaven and Hell are suspicious, and Crowley and Aziraphale have a disagreement.