Senior co-administrator of the Norcoast Salmon Research Facility, Dr. Mackenzie Connor - Mac to her friends and colleagues - was a biologist who had wanted nothing more out of life than to study the spawning habits of salmon. But that was before she met Brymn, the first member of the Dhryn race ever to set foot on Earth. And it was before Base was attacked, and Mac's friend and fellow scientist Dr. Emily Mamani was kidnapped by the mysterious race known as the Ro.From that moment on everything changed for Mac, for Emily, for Brymn, for the human race, and for all the many member races of the Interspecies Union.Now, with the alien Dhryn following an instinct-driven migratory path through the inhabited spaceways - bringing about the annihilation of sentient races who have the misfortune to lie along the star trail they are following - time is running out not only for the human race but for all life forms.And only Mac and her disparate band of researchers - drawn from many of the races that are members of the Interspecies Union - stand any chance of solving the deadly puzzle of the Dhryn and the equally enigmatic Ro. Read Less