The novel takes place on the planet Pilgrim in the Savage star system, fifty years before the events on Terrius. Earthlings discover a strange planet on which someone has “forgotten” artifacts, which are pyramids of unknown purpose. Young operative John Rawls is sent to Pilgrim on a secret mission. His mission is to find out whether alien structures pose a danger to the lives of three hundred and fifty colonists. The task seems simple and familiar, but everything changes when the colonists do not get in touch at the appointed time.