The residents of a small town are excited when a flaming meteor lands in the hills, until they discover it is the first of many transport devices from Mars bringing an army of invaders invincible to any man-made weapon, even the atomic bomb.

Rick Belrow Livingston, in love with Broadway star Lisa, is sentenced to 30 days in jail for speeding through a small town. He persuades the judge's daughter Cindy to let him leave for one night, so that he can visit Lisa on her birthday. After that he goes on the town with Cindy and she falls in love with him. But Dr. Schemmer wants his son to become her husband.

Anchor is building a railroad and to get cheap labor he gets Black Hawk's Indians to attack and burn the incoming wagon train. This forces the settlers to work for Anchor and he pays them in devalued scrip. When Rex figures out Anchor's swindle, Anchor gets Black Hawk to capture him. When Anchor turns on Black Hawk and shoots him, Black Hawk gets a chance to repay a debt to Rex.

A mismatched couple's marital problems come to the surface when the husband develops an interest in their pretty boarder.