Former government agent Frank Compton races to stop the Modhri, an ancient, telepathically linked intelligence that has possessed unwitting hosts, but his quest is threatened by a secret agent who suspects him of murder.

"Frank Compton used to be an agent for the security forces of Earth, but that was a piece of cake compared to what he's had to deal with working for the aliens who run the Quadrail, an interstellar transportation system connecting a dozen civilizations across the galaxy. He's been trying to end the domination of an alien lifeform called the Modhri. This enormously powerful creature wants to rule the galaxy by controlling the thoughts of all its citizens....