Special effects-laden sci-fi action thriller starring Will Smith, set in a near-future in which robots have become a vital component of human beings' everyday lives. Although the technology of the robots has become more and more advanced, they are all pre-programmed to always obey humans and under no circumstances to harm them. So when robot scientist Dr Alfred Lanning (James Cromwell) is murdered and a humanoid robot is implicated, the authorities are extremely worried: if the robots can overcome the basic moral principle of their existence, what's to stop them taking over the world? Robot-hating Chicago Police Detective John Spooner (Smith) is assigned to investigate this alarming case...