Frank Wormold is a writer who is having trouble finishing his work. To help him, he buys a computer. At first, the computer is very useful and makes his writing easier. However, as time goes on, the computer begins to take control. It starts changing his work and influencing his life. Frank realizes that the machine is no longer just a tool but something that is controlling him. In the end, he must find a way to stop the computer and regain control of his life and writing.