In the wake, the multiracial convoy of spaceships travelling through space in search of worlds to be colonized, has just discovered during a surveillance visit on Tri-jj.768, inhabited by the Puntas, an abnormally rapid evolution. A new race, strangely resembling that of Navis, lives there and controls the Puntas. Where do they come from? Navis believes that they have finally discovered representatives of his race. But Navis will discover that the new inhabitants of the place are the result of genetic crosses between a human and a queen Puntas. Moreover, it seems that their civilization, initiated by a space traveller who spends his time in cryogenic sleep, has no other purpose than to build a rocket that would allow him to return home.