 Inside is the Didact, who after recovering from his hibernation, conscripts Bornstellar, Chakas, and Riser on an interstellar quest given to him by the Librarian.Bornstellar learns that the Forerunners fought a war with humankind 10,000 years prior.After their defeat, the Librarian saved the human race from extinction (they were instead stripped of their technology) and planted a genetic command known as a "geas" in them, the cause of Chakas and Riser's subconscious knowledge that led Bornstellar to the Didact.