When a dispute occurs between a logging operation and a nearby Native American tribe, Dr. Robert Verne and his wife, Maggie, are sent in to mediate. Chief John Hawks insists the loggers are poisoning the water supply, and, though company man Isley denies it, the Vernes can't ignore the strangely mutated wildlife roaming the woods. Robert captures a bear cub for testing and soon finds himself the target of an angry mutant grizzly.

Delos is a futuristic amusement park that features themed worlds—ancient Rome, Medieval times and the Old West—populated by human-like androids. After two patrons have a run-in with a menacing gunslinger in West World, the androids at Delos all begin to malfunction, causing havoc throughout the park.

A mentally and physically scarred monster rampages through the old west, killing and raping as he seeks to meet up with his cohorts in a bank robbery. He is pursued by a vengeful posse who have no thoughts of bringing him back for justice.

Audie Murphy is again the kid who puts on a badge to catch the bad guy, skillfully played by Barry Sullivan. On the way back to town the two develop a curiously close relationship - Sullivan passes up several chances to get away - but in the end Sullivan "asks for it" and Murphy obliges.