在这部印第安巨兽恐怖/西部片中,美国内华达州的古矿场冒出怪烟，一头昂藏八尺高的巨兽从胚胎里地底孵出。其后，这头怪兽于市内横冲直撞，伤及无辜。市长征召市民围捕之，巨兽最终被收服并制成标本，更被命名为「世界第八大奇景」！
A Large mutated sheep Embryo is discovered by a rancher .The mutant is whisked away to the secret lab of Dr. Clemens and his faithful assistant Mariposa. Dr. Clemens discovers that the old mine gives off some strange Phosphorus vapors that may be the cause of the mutation, as well as being the origin for the old legend of a monster that once haunted the area. Clemens puts the Creature in an Incubation Chamber and it's not long before the mutant sheep has morphed into an 8-foot monstrosity, which escapes & terrifies the town.
