When a press conference is called to announce the creation of "Tobor", reporters, such as the inquisitive journalist Gilligan (Alan Reynolds), are invited to Professor's Harrison's home to see the remarkable invention. In order to undertake space travel, the remote-controlled robot has been given some human capabilities, including the ability to "feel" emotions and react via a telepathic device built into his robotic brain. Under the watchful eyes of Harrison's trusted assistant Karl (Franz Roehn), the giant robot Tobor is unveiled and then demonstrated. Unknown to the scientists, a foreign spy chief (Steven Geray) has quietly joined the group of reporters; he quickly draws up a plan to steal the robot.