An alien race is poised to invade the Earth and wipe out humanity, so the SG-1 team must journey to a distant galaxy to prevent the attack, but another enemy has plans to stop them. Sci-fi adventure based on the TV series, starring Michael Shanks, Amanda Tapping, Christopher Judge, Claudia Black and Ben Browder.

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.