Three empires and their spheres of influence existed in uneasy proximity in the known galaxy. The Exchange, among whose hundreds of member worlds was Earth, was led by its cybernetic leaders. The Mizlaplan were long-lived, with high intelligence, and a mission to spread the word of the Cosmic All. The Mycohlians were parasitic beings who invaded other life forms like a virus, and controlled them. Oddly, all three empires had only one thing in common: demons.Each had a legend of humanoid creatures with hooves and horns, representing supernatural power and unspeakable evil. The similarity of the legends across the galaxy had led some to theorize that they had some basis in fact. Unfortunately, they were right.On an Earth-like planet in a region of space called Rainbow Bridge, an Exchange scouting expedition has found a mysterious structure with its mechanisms still functioning after unknown aeons. Within are the bodies of two horned creatures, gigantic in stature, perfectly preserved. Some races thought the demon world should be destroyed. The Mycohlians, who perversely revere the demons of their legends, wanted to make it a shrine. And some wanted to investigate. That was a fatal mistake for the investigators. The demons were not dead, just sleeping. And their wakening began a terror-filled nightmare for all the galaxy!