Hacker/arcade owner Kevin Flynn is digitally broken down into a data stream by a villainous software pirate known as Master Control and reconstituted into the internal, 3-D graphical world of computers. It is there, in the ultimate blazingly colorful, geometrically intense landscapes of cyberspace, that Flynn joins forces with Tron to outmaneuver the Master Control Program that holds them captive in the equivalent of a gigantic, infinitely challenging computer game.

The USG Ishimura, a miner spaceship, is transporting a strange artifact called the Red Marker. In the Aegis VII colony, where the Red Marker was found, there are some suicides and murders and the people are slowly going mad. The people are being infected by something. Barrow, the foreman, finds the body of his wife having committed suicide. Barrow decides to escape the colony's madness and, taking his wife's body, goes on board the Ishimura. But something happens to Barrow's wife on board the...