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...