Engaged in combat, the Atlantis team's puddle jumper is hit with an energy wave that leaves them unharmed, but destroys their Wraith attackers. Hoping to find the source of the wave, the team lands on the planet below. There they find a civilization enjoying the utmost health and happiness, untouched by the Wraith. Their leader, Chaya, refuses to allow anyone other than her own people the sanctuary and safety from the Wraith that would be found by settling on their planet. Unwilling to give up so easily, Major Sheppard asks Chaya to reconsider. After thinking it over, Chaya surprises everyone by requesting to accompany them back to Atlantis to discuss the matter further leading the team to suspect they may be caught in a trap.

The Atlantis team travels to Dagan, a planet with a hidden ZPM and a mysterious trail that will lead to its hidden secret chamber location. But the Genii have learned of the Atlantis team's activities on Dagan. Realizing the ZPM must hold awesome power, the Genii plant a sleeper agent amongst the Daganians aiding the Atlantis team on their search. Now, as the Atlantis team closes in on the location of the ZPM, the Genii close in on them.