 In the 23rd century, the survivors of a holocaust now lives within a domed city that is sealed off from the outside world. In the domed city, men and women live in a society where you can only live until you are 30-years old (due to population control and limited resources), the people have two choices: They can either take part in a extermination ceremony called "Carousel" where they are promised of being reborn or they can go on the run and escape to outside the domed city. Logan 5 is a Sandman, a elite policeman whose job is terminate all "Runners" who refuse to be exterminated on Carousel and escape to outside the city. When Logan finds a symbol, the computer that controls all life in the city, gives Logan a undercover assignment to find and destroy a mysterious place called Sanctuary by posing as a runner, by removing the last four years of his life from his life crystal. Now on the run himself, and hunted by his partner and best friend Francis 7, Logan and a woman named Jessica 6 working for a underground resistance group that are helping all Runners search for Sanctuary escapes from the domed city and find themselves in a devastated Washington D.C, where Logan and Jessica discover another world and find there is much to live for and Logan begins to question the system.