Two reporters, Tracy and Chuck, get a message from a third one who discovered something about "Futureworld" and becomes killed before he could tell anyone about it. They visit Futureworld to find out what he knew.

In the year 2274, the remnants of human civilization live in a sealed domed city, a utopia run by a computer that takes care of all aspects of their life, including reproduction. The citizens live a hedonistic lifestyle but understand that in order to maintain the city, every resident when they reach the age of 30 must undergo the ritual of "Carrousel" [sic]. There, they are vaporized and ostensibly "Renewed." To track this, they are implanted at birth with a "life-clock" crystal in the palm of their hand that changes colors as they approach their "Last Day."

After fully recovering from her nearly fatal bout of bionic rejection, Jaime Sommers, the first female cyborg, is assigned to spy missions of her own.