As another day of fantasy plays out in Westworld - a vast, remote park where guests pay top dollar to share wild-west adventures with android "hosts" - top programmer Bernard Lowe alerts park founder Dr. Robert Ford about incidents of aberrant behavior cropping up in some recently re-coded hosts. Meanwhile, in the Westworld town of Sweetwater, a rancher's daughter named Dolores encounters aballoonslinger named Teddy in the street - but their predictable narrative is upended by the appearance of a ruthless Man in Black and, later, by a supporting host's unscripted encounter with an artifact of the outside world.
The story revolves around a futuristic theme park staffed by robots that can help guests live out their fantasies. The park breaks down, however, and two guests taking a Wild West adventure find themselves stalked by aballoon-slinging android.