Based on the 1967 novel of same name William F Nolan and George Clayton Johnson . In the 23rd century , the last known humans , descendants of the survivors of a global thermal Nuclear war live in a self contained city of Domes, The people live under the city's master control computer which runs the city and regulates ans control all aspect of citizen lives from both to death . The people under it care/control an enjoy life of ease and pleasure and happiness , there's just one catch, life ends at age 30, no doubt this devised as a means population control. When citizens are born , a glowing time crystal is embedded into the palm of tea hands . It starts our yellow in first decade off life , then in second decade, the crystal goes blue and your third decade goes to red and stay that color until time your 30the year and then, it starts flash red and black. We this happens , you have two choices . You can go on Carousel with a chance of renewal you life and living ( of which none have renewed ) or you can try and escape from the city by becoming a runner to get to a place of safety known as Sanctuary. but if you do that, the Policemen in the city. called Sandmen armed with a special gun for terminating runners , will find you and end you. It's relatively easy to find Runners because the city and the Sandman can track them via scanners , The Computer over the years has had Runners seemingly escaped and to date , 1054 runners are unaccounted for which the computer find unacceptable . It decides to use one Sandmen Logan 5 to make contact with the group that helps runner escape by causing his time crustal to blink to make them think he's a Runner. The computer's goal to eliminate Sanctuary .and this discrepancy that it cannot tolerate . He meets with a contact with optical for obvious reasons woman he tried to date named Jessica 6. Untimely he manages manages to convince that her that he want to run. and this just the beginning of tboth heir adventure.