Hari Seldon had just invented psychohistory and he saw it as pure speculation, with no practical application. Psychohistory couldn't predict the future? The politicians didn't care! People were going to believe it. Then the equations would say whatever we made them say. And if Seldon didn't agree, too bad for him!
So the young researcher fled. Hunted, he crisscrossed the underground mazes of the planet Trantor, capital of the Galactic Empire. And what he saw amazed him. A worrying future was emerging before his eyes. Was it too late to avert disaster?