In order to gain immortality, Dr. Phibes plans on setting off an EMP bomb at the end of the "Polar Bear 3000" race which will destroy all electronics across the world! Therefore, all the world's scientists will have to work for him. Naturally, Shaggy and Scooby enter the race to make sure that he doesn't succeed! However, they discover that Phibes had planted the device in the Mystery Machine. Therefore, they go back in time to stop it.