 It is 2274. Some type of holocaust has decimated the earth, and the survivors sealed themselves into a domed city near Washington, D.C. To maintain the population balance, the computers that run the city have decreed that all people must die at 30. This system is enforced by "sandmen" : black-clad police operatives who terminate (kill) "runners" (those who attempt to live beyond 30). Logan, a sandman, is sent on a mission to find "sanctuary," which is a code- word used by the master computer to describe what it believes is a place to which runners have been escaping. Logan begins to question the system he serves and after seeing for himself that there is life beyond the dome, he returns to destroy the computer.