 Sheppard, Teyla, Ford and Rodney are investigating a known location of a Wraith base, but it seems to have disappeared. Teyla thinks it, as as ship, has started culling worlds. Then the Wraith attack. While fleeing to the puddle jumper Sheppard is bitten by a bug that immediately paralyzes him and seems to suck life away from him, just like the Wraith do. It can t be removed, not even after Ford shoots it. The Wraith damage the jumper and its engine pods can t be retracted, causing the rear end to get stuck in the stargate There s 38 minutes before it automatically closes, which will sever the jumper, killing all inside. Rodney and the Atlantis team try to think of a solution. Meanwhile Sheppard feels he is dying. Dr. Beckett suggest trying every substance to remove the creature.