With the Solar System reeling from the events of The Triton Run, Bruce Parynski investigates the incredible opportunities presented by the portal world Propylaea.
 
Meanwhile, just as it appears that the Qarti are not what they were thought to be, a new threat emerges. Still seeking redemption, infamous war criminal Dee Wilding leads a desperate mission to save humanity. She’s accompanied by Chris Squire, her old colleague, to the one place in the universe that he would not want to go, where years earlier something terrible happened.