By 3015, the world has changed a great deal; it is now divided into two main blocks comprised of The East and The West. Many of the old prejudices appear to have disappeared. A ’gene’ for homosexuality has been discovered and has subsequently wiped out all justification for discrimination based on sexual orientation. However, some long for a return to the old values. A clandestine group called ’The Moralists’ is still out there and are a constant threat to those with the ’gene.’ When an alien race who have lost the ability to procreate due to a polluted water supply invade Western Earth; fertile persons with the gene are put in a ’re–education’ camp to become future breeders for the conquering aliens.