Machiko Noguchi accepted the assignment of supervising the ranching colony on Ryushi as a challenge. Little did she know that not onl would she have run the colony, she'd have to defend it with her life!

First the carcass of a spiderlike alien is discovered. Then a rancher's family is massacred. Finally a creature unlike any ever seen before is brought to the colony medical center, near death. It soon becomes clear thtat not one but two strains of alien life have landed near the settlement of Prosperity Wells. One kind -- beetle black with shells hard as steel -- have been spawned as the prey in a deadly hunt. The other kind -- upright like humans but infinitely stronger and just as smart -- are the Predators. Between them are the human colonists, unarmed and vulnerable. With the entire colony at risk, Machiko Noguchi must choose between death and survival -- and may find her greatest ally in a Predator ready to kill her...