In book one, The Sixth Sun humans saved by Osirians, are told they owe a debt of gratitude to the immortal Osirian race and volunteer for a manned space mission to a planet that is emitting a radio signal. The Osirian quest to discover why they are immortal had been fruitless until they found life on Earth. The planet this mission is destined to explore is dubbed Elysia located in the Tarus system (both named in honor of Osiriat's king and queen) and is located 59 light years away from Osiriat which itself is hidden in the Sirian binary system. An emergency distress signal is received from the ship, Osiriat VII and all are feared dead. King Jupoler and his sister/co-ruler, Arop (newly appointed King and Queen when Tarus and Elysia retired) gather, at the behest of Tarus, the crew of Osiriat VI who readily agree to join what is considered a hopeless rescue mission. To their astonishment, Captain Adam survived, but contrary to his ultimate directive, never interfere with societal growth, he appears to be treated as a God ordained by the Goddess, Gaia, amongst the primitives. From here we witness 4750 years of the Osirians desperately trying to convince the inhabitants of the planet Gaia, through Adam, to embrace the science they once knew to join the Osirians in exploring space.
