David, a young man who has lost his memory, finds himself the subject of a
bizarre experiment that shifts him back and forth between alternate realities.
One of these realities is a time soon after the Third World War when,
weakened by the global conflict, the human race falls easy prey to Martian
invaders who occupythe earth, siphon off the planet’s oxygen and give it back
in capsule form only if the people do as they are told. The earthlings become
the helpless slaves to the Martians, willing to do almost anything in return for
the life-giving oxygen capsules.
Memories of lost freedoms are preserved by a devoted few. Among them
the rebels who wagea constant guerrilla war against the alien invaders and
who will soon be facing their greatest battle, the outcome of which will only be
assured if David can uncoverthe nature of his role and the secret purpose of
the strange experiment.