Carter tries to figure out what a strange device found in Merlin’s cave does, after Dr. Lee failed to figure it out after six months. Carter finds something interesting, which unfortunately causes her and Mitchell to be transported to an alternate dimension. They can see and hear those around them, but no one can hear or see the two.
Teal’c, meanwhile, goes with SG-12 on a mission to check on the Sodan, after a distress message is received. Once there, they find Volnek has been affected by a Prior and is now killing everyone in his group in a crazed frenzy and madness, after actually having died.
The two story lines converge when Mitchell decides to go in his “out of sync” state with a second SG team set to rescue Teal’c and SG-12.