Somewhere at the edge of known space is the Great Void. That inscrutable, shapeless, ever-changing place is where the expanding universe springs forth, where new planets and new life forms are created. It s also, according to the gods of Hypsis, the place where Galaxity's Earth was sent and is being kept prisoner. Valerian and Laureline begin a discreet investigation, but it doesn't take long before they start finding obstacles in their path, placed by the rulers of Rubanis - and their mysterious master...