Within Sector 3309 of the Bortuks Galaxy are five planets that possess intelligent beings: Senoobis, Karyntis, Peyr, Krees and Nanzema. Three bold Senoobians escape the destruction of their starship to find themselves marooned on Karyntis, known as Earth to its human inhabitants. No longer proud officers of the starship Syzilian and without their advanced technology, they resign themselves to an austere and guarded life among the humans on Karyntis - some amiable, some evil. When their old enemies from Peyr turn up, threatening them and humans as well, they must figure out how to warn the humans without inviting more danger to themselves. The last Senoobians - Bayn, Darz and Jeliko - must safeguard their most precious possession while preparing Amara and Marco to survive on their own.