Dr Beaker and Professor Popkiss are invited to test drive a new atomic train. They discover the train has been sabotaged and Supercar is needed to try and save them using a new tool recently developed for the United States Army.
Masterspy now rich beyond his wildest dreams decides rather than steal Supercar he will just outright purchase the car. Unfortunately for him, Dr Beaker has decided Supercar can not be purchased for any price.
The Supercar team pick up a strange radio message that seems to indicate some one is in need of help. With little or no information the team sets out to solve the mystery.
Counterfeiters, in search of special plates used to make American dollars, realize the location of the plates are revealed in a painting just sold to Dr Beaker. They need to get the painting back no matter what the cost.
Dr Beaker decides to order a case of wine from France to try and add something to his poor cooking skills. When the crate arrives it contains something far more valuable than wine.
While on a journey to the South Pole Supercar comes under the control of a strange force that overrides the Supercar controls and forces it to land on a remote island. As they explore the island they discover who is behind these strange events and the danger they are in.
The Supercar project has moved to England to install new control circuits for the guidance system. A disgruntled employee steals the units effectively grounding Supercar giving him breathing room to make good his escape.
Dr Beaker decides to make a movie about Supercar, however when the watch the developed film they discover information that could put the future of the United States in danger.