In the twenty-fifth century, humankind has spread throughout the galaxy, monitored by the watchful eye of the U.N. While divisions in race, religion, and class still exist, advances in technology have redefined life itself. Now, assuming one can afford the expensive procedure, a person's consciousness can be stored in a cortical stack at the base of the brain and easily downloaded into a new body (or "sleeve") making death nothing more than a minor blip on a screen.