Description
A television announcer reports sightings of a red fireball around the world. Facetiously, he calculates its path will take it to California. Nancy Archer (Allison Hayes), a wealthy but highly troubled woman with a history of emotional instability and immoderate drinking, is driving on a road that night in an American desert. A glowing sphere settles on the deserted highway in front of her, causing her to veer off the road. When she gets out to investigate the object, a huge creature exits and reaches for her (the viewer sees only an enormous hand falling upon the screaming woman).
Nancy escapes and runs back to town, but nobody believes her story due to her known drinking problem and a recent stay in a mental institution. Her philandering husband, Harry Archer (William Hudson), is more interested in his latest girlfriend, town floozy Honey Parker (Yvette Vickers). He pretends to be the good husband in the hope that Nancy will "snap" and return to the "booby hatch," leaving him in control of her $50 million estate.
Nancy bargains with Harry, asking him to search the desert with her for the "flying satellite," agreeing to a voluntary return to the sanatorium if they find nothing. As night falls, they find the spacecraft and the alien creature emerges, revealed as an enormous male human. Harry fires his pistol at the giant, but the gunfire has no effect. Harry flees, leaving Nancy behind.
She is later discovered on the roof of her pool house in a delirious state and must be sedated by her family physician, Dr. Cushing (Roy Gordon). The doctor comments on scratches he finds on Nancy's neck, and theorizes that she was exposed to radiation. Egged on by his mistress Honey, Harry plans to inject Nancy with a lethal dose of her sedative, but when he sneaks up to her room, he discovers that she has grown to giant size. In a scene paralleling Nancy's first alien encounter, only an enormous hand is seen as Harry reacts in horror.
Cushing and Dr. Von Loeb, a specialist brought in by Cushing, are at a loss on how to treat their giant patient. They keep her in a morphine-induced coma and restrain her with chains while waiting for the authorities to arrive. The sheriff and Jess (Ken Terrell), Nancy's faithful butler, track enormous footprints leading away from the estate to the alien sphere. Inside the sphere, they find Nancy's diamond necklace (containing the largest diamond in the world) and other large diamonds, each in a clear orb. They speculate that the jewels are being used as a power source for the alien ship. The huge human reappears, and the sheriff and Jess flee.
Meanwhile, Nancy awakens and breaks free of her restraints. She tears off her mansion's roof and, clothed in a bikini-like arrangement of bed linens, heads to town to avenge herself on her unfaithful husband. Ripping the roof off the local bar, she spots Honey and drops a ceiling beam on her rival, killing her. Harry panics, grabs Deputy Charlie's pistol, and begins shooting, but she picks up Harry and walks away. The gunshots have no apparent effect on her. The sheriff fires a shotgun at her, which causes a nearby power line transformer to blow up, killing her. The doctors find Harry lying dead in her hand.
