Captain Karl Taylor is sent to investigate mysterious alien signals from the Moon, but the sights and sounds of the alien “city” he encounters are entirely incomprehensible to human perceptions. Taylor thus orders his people to open fire, apparently fearing that they are under attack. This is the start of a war between the alien Myloki and PRISM, the secret organisation created to fight the invaders. The Myloki attack by transforming ordinary human beings into their puppets; most are merely drone-like zombies known as Shiners, but two are different. One is Captain Taylor, who is sent back to Earth as a walking, indestructible, reanimated corpse, an emotionless killing machine. The other is Captain Grant Matthews, who is killed and duplicated while on a routine escort mission; however, his duplicate is caught and deprogrammed of his Myloki conditioning, and, like Taylor, is found to be literally indestructible.