In a sector of the Galaxy occupied by Earth-descended people, one Berserker computer has suddenly and mysteriously developed a tactical strategy unlike anything the human opposition has seen before. Shiva, like the Hindu god of destruction after which it was named, annihilates entire colonies with the help of its fiendish subordinates. When a decision is made to destroy the destroyer, neither side is prepared for the incredible risks that emerge as the attack becomes imminent. Can either side face the possibility that something wholly unexpected and eerily familiar lies gnarled within the steel?