The early 21st century. The totalitarian state of Libria has been established following a third world war and is presided over by the ubiquitous video-image of ‘Father’. To maintain harmony, the populace are forced to self-medicate with the emotion-suppressant Prozium. Sense Offenders, who skip doses and secretly hoard artworks, are hunted down by an elite squad of Clerics, trained in the martial art Gun-Kata (which enables its practitioners to predict the path of bullets fired at them).