Five and a half centuries into the future:
The Earth has died but mankind has spread out across the galaxy, exploring new planets and meeting new forms of life.
The spread of mankind is followed by the growth of Cyclone Pharmaceuticals, whose goal is a better and healthier life for all humans. And maximum profits.
The growth of Cyclone Pharmaceuticals is followed by the GreenSPACE movement, whose goal is a healthier life for all living beings in the universe, human or not.
The GreenSPACE Movement is followed by those who believe that GreenSPACE doesn't go far enough: The Silent Runners.
These are the stories of the people--not all of them human--who watched the rise and fall of the "Silent Runners," and had their lives changed by them--and not always for the better....