After several successful tests using Merlin’s device to take objects and areas out of phase, General Landry (Beau Bridges) sends SG-1 to use the device to protect a village from an aggressive Prior. Greeted by the village leader Thilana (Aisha Hinds) SG-1 sets up Merlin's device and uses it to successfully take the entire village out of phase.
But when the displacement field collapses bring everything back into phase, the team must act fast to fix the device before the Prior and his army return. While Carter (Amanda Tapping) struggles to get the device operational in time Mitchell (Ben Browder), Teal'c (Christopher Judge) and Vala (Claudia Black) prepare the village to fight off an incoming Ori army. While a fire fight ensues Carter is blind sighted by an Ori soldier who blasts her and the device. Mitchell, killing the soldier, saves Carter who forces him to activate the device just in time to take themselves and the lab out of phase. As the rest of the village is rounded up and most of them executed by the Ori army their leader Tomin takes Vala back to the ship.