Macklin and his gang are causing problems in Colorado, Lieutenant Jerry Burke (Roy Rogers) is sent to track them down but only to find his brother commands them.
Professor Bruno Volpi spots some strange paintings on a cliff. He sends for Professor Zovek to help him discover its meaning. Zovek uses his powers to figure out the writings are a warning that a cosmic tragedy is going to happen. Their fears prove to be true when a fire ball falls from the skies causing the ressurrection of the dead as zombies, craving for human flesh.
An outlaw enlists the aid of his pal and a robber gang to pull off a gold heist. When a treacherous gang absconds with the gold, the outlaw and friend set off to capture them.