 The immortals create a plan to subtly harness Extro to aid them in their quest for knowledge and use some of the experience they've gained to assist it in its task.Working outside of expected behavior, Extro instead seizes control of Dr.Guess, leaving the only people who know what's going on — the Immortals and Guess's nearest friends — to grapple with the heart and mind of a malevolent machine in the body of an Immortal, a powerful and ingenious man who cannot be killed.