Based on the H.G. Wells story, this film centers on George Fotheringay (Roland Young), a retired man who receives nearly limitless power from a group of supernatural beings. At first George is amazed by the powers, but also worries about how to use them properly. Advised by Mr. Maydig (Ernest Thesiger), George attempts to end war and disease. However, after using his powers for selfish purposes, George finally comes to a decision about the best way to deploy his abilities.