500,000 years have passed since the events of Aftermath. The Terrans stand on the very brink of the next phase of their evolution. Their guardians decide to tell them the truth of how their civilizations became intertwined in the hopes of spurring them over the edge and walking into the next phase of their development together. Unknown to Persephone or her team, a cancer festers in the dark places of the city. She must find out what is causing the unrest that tears at the foundations of the society she and her team have helped to build. Falling severely ill and fighting her own demons she must unravel the mystery before the Terran's succumb to this unknown adversary.