When an SG team returns with a corn-like food stalk that has addictive, and mind altering effects, SG-1 is sent to investigate. They head to the planet where the corn-like food, known as kassa, is grown, but their investigation provokes an angry response from the Lucian Alliance that controls the food. While under fire from the alliance, and as they are attempting to dial home, the Stargate and DHD suddenly disappear, leaving SG-1 trapped.

After SG-1 is later rescued from the alliance by Earth’s newest ship, the Odyssey, SG-1 tries to find out who stole the gate. Gen. Landry decides to seek help from the Goa’uld Nerus. Nerus eventually breaks down, after some creative torture techniques by Gen. Landry, and tells them who stole the gate on the alliance’s planet and several other gates as well.

The answer shocks the team, and poses many additional impossible challenges to getting the gates back, but reinforces the need that they do, for the sake of Earth’s future existence.