Nathan, Celeste, Thousand-Deaths and Rhegium find themselves taken from certain death and transported to a Xanthian Deep-hauler, where they learn, much to their chagrin, that they are to be used for the fulfillment of an eons-old battle between universes, used to correct a wrong committed in the future that will, if they are successful, render their lives non-existent. Separated into pairs and forced to retrieve lost time-devices for The Unity, our heroes discover that what they have been told is not necessarily the truth and when they discover the truth, they will see for themselves that their sacrifice is the only way to stop an inter-universe war that will destroy both Humanity and the Sslithax in its drive to recover the lost time-devices. From the ancient ruins of Old-Earth to the massive Generation ships of the Demon-Spawn, The Chaos of Unity is the epic conclusion of the best science fiction book series the Sslithax Heresy.