Good Omens: The Nice and Accurate Prophecies of Agnes Nutter, Witch recap

The angel Aziraphale and the demon Crowley have spent millennia on Earth and, having grown fond of the world and of each other, dread the coming Apocalypse. The Antichrist has been born, but through a mix-up at the hospital the diabolical baby is sent home with an ordinary English family instead of the intended one, and grows up as Adam Young, a normal boy in the sleepy village of Lower Tadfield, while Heaven and Hell fuss over the wrong child. As Adam turns eleven and Armageddon approaches, his latent powers begin to wake, reshaping the world around him according to his boyish whims. Aziraphale and Crowley scramble to prevent the end of the world, aided and hindered by the witch Anathema Device, guided by her ancestor Agnes Nutter's uncannily accurate prophecies, and the hapless witchfinders Newton Pulsifer and Sergeant Shadwell. The Four Horsemen gather and the forces of Heaven and Hell mass for the final battle. In the end, Adam refuses the destiny chosen for him, rejecting his role as Antichrist and using his power to send the Horsemen away and defy his infernal father, stopping Armageddon by human choice. The world is saved, and Aziraphale and Crowley cleverly evade punishment from their respective sides.

The end of the world is scheduled, and neither the angel Aziraphale nor the demon Crowley wants it to happen. After thousands of years stationed on Earth, the two have come to love human life and, quietly, each other's company, and they would rather the world went on. The trouble is that the Antichrist has been born and is meant to be delivered to a prominent family so that he can grow up to trigger the Apocalypse. But a mix-up at the hospital sends the wrong baby home, and the true Antichrist is raised as Adam Young, an ordinary, imaginative boy in the tranquil English village of Lower Tadfield, while Heaven and Hell keep their eyes on the wrong child entirely. As Adam grows toward his eleventh birthday and the appointed day draws near, a sprawling cast is drawn toward Lower Tadfield, including a witch guided by a book of unnervingly accurate old prophecies and a pair of bumbling witch-hunters, all of them caught up, knowingly or not, in the countdown to Armageddon.

Armageddon is averted not by Heaven or Hell but by the free will of a single ordinary child. As the End Times arrive, the Antichrist, Adam Young, comes fully into his powers, but rather than destroying the world he has grown up loving, he refuses the role written for him. Confronted with the machinery of the Apocalypse, Adam dismisses the Four Horsemen, faces down the arriving forces of Heaven and Hell, and rejects Satan himself, denying that the being is truly his father because his real father is the human man who raised him. By choosing humanity over destiny, Adam calls off the end of the world, and reality settles back into place. In the aftermath, Aziraphale and Crowley must answer to their furious superiors for having sided with the world instead of the war. Forewarned by a final prophecy of Agnes Nutter, they swap appearances, so that when Hell tries to execute Crowley and Heaven tries to punish Aziraphale, each survives the ordeal meant for the other, and their masters give up on them. Newton Pulsifer and Anathema Device are left together, having burned the last of Agnes's prophecies to live their own lives free of foreknowledge. Adam returns to being an ordinary boy in Lower Tadfield, and the two old friends from opposite sides sit down to enjoy the world they saved.