In a future post-apocalypse Earth in the year 2293, the human population is divided into the Immortality "Eternals" and mortal "Brutals". The Brutals live in a wasteland, growing food for the Eternals, who live apart in "the Vortex", leading a luxurious but aimless existence on the grounds of a country Estate (house). The connection between the two groups is through Brutal Exterminators, who kill and terrorize other "Brutals" at the orders of a huge flying stone head called Zardoz, which supplies them with weapons in exchange for the food they collect. Zed (Sean Connery), a Brutal Exterminator, hides aboard Zardoz during one trip, temporarily "killing" its Eternal operator-creator Arthur Frayn (Niall Buggy).