The human defenders of PRISM are enmeshed in a doomed interstellar war against an unknowable invader armed with the power to possess, duplicate and destroy from within. Only one man stands in their way. A man destiny has made indestructible. Against all the odds the legendary Indestructible Man saves the Earth but victory comes at the highest price. The world economy collapses, governments crumble and PRISM itself is torn apart by a best-selling exposé. AD 2096: PRISM has gone underground, becoming the clandestine SILOET headed by new commander Hal Bishop. The implications are terrifying.