The Stargate team faces their biggest challenge yet as they set out in search of the ancient artifact known as the Ark of Truth, which has the power to control people, causing destruction and chaos. With the villainous Ori also out in search of this powerful weapon, the Stargate team must find and defeat Ori before they find the artifact and launch a devastating attack on planet Earth. With a scheming operative aboard their ship, the final fight for humanity begins to unfold in the deepest reaches of space.