Dr. Tom Anderson (Van Cleef), an embittered scientist, has made contact with a Venus in fiction creature, while using his radio transmitter. The alien's secret motivation is to take complete control of the Earth by enslaving humanity using mind control devices; the alien claims it only wants to bring peace to our troubled world by eliminating all emotions. Anderson agrees to help the creature and even intends to allow it to assimilate his wife (Garland) and friend Dr. Nelson (Graves).