In the year 2035, robots are a common, trusted part of life. But that trust is broken when a scientist is found dead, and a skeptical Chicago police detective investigating the murder believes that a robot is responsible. It seems impossible for a robot to break the Three Laws of Robotics, for if that were to happen there would be nothing to stop them from taking over the world. Aiding the detective in his investigation is a psychologist who specializes in the psyches of robots. Will technology ultimately lead to mankind's salvation or annihilation?