Lt. Colonel Mitchell, Lt. Colonel Carter, Dr. Jackson, Vala Mal Doran and the alien, Tealc, all members of the elite Stargate SG-1 team, travel to the ruins of Dakara in hopes of finding the fabled Ark of Truth. Built by the Alterans, (builders of the stargates) millions of years before, this ancient artifact may be the sole means remaining to defeat the Ori armies who have thus far proven unstoppable in their quest to conquer the universe in the name of their religion, Origin.