In the future, the inmates of a private underground prison are computer-controlled with cameras, dream readers, and devices that can cause pain or death. John and his illegally pregnant wife Karen are locked inside "The Fortress" but are determined to escape before the birth of their baby.

The Resonator, a powerful machine that can control the sixth sense, has killed its creator and sent his associate into an insane asylum. When a psychiatrist becomes determined to continue the experiment, she unwittingly opens the door to a hostile parallel universe.