Edward Carnby is a private investigator specializing in unexplainable supernatural phenomena. His cases delve into the dark corners of the world, searching for truth in the occult remnants of ancient civilizations. Now, the greatest mystery of his past is about to become the most dangerous case he has ever faced.
Ba'al travels back in time and prevents the Stargate program from being started. SG-1 must somehow restore history.
SG-1 searches for an ancient weapon which could help them defeat the Ori, and discover it may be in the Ori's own home galaxy. As the Ori prepare to send ships through to the Milky Way to attack Earth, SG-1 travels to the Ori galaxy aboard the Odyssey. The International Oversight committee have their own plans and SG-1 finds themselves in a distant galaxy fighting two powerful enemies.
