Having learned that the entire Wraith armada is headed towards the city, the Atlantis team prepares to send a data message to Earth with information about the Wraith threat, and what could be their last messages home to loved ones.As the rest of the team records their touching and often humourous messages back home, Major Sheppard and Teyla embark on a reconnaissance mission where they witness the vastness of the Wraith army, and look on helplessly as the Wraith cull the planet's helpless inhabitants.

With the Wraith armada closing in on Atlantis, Dr. McKay and a small team attempt to repair an ancient weapons satellite in the hopes of leveling the odds in the coming battle. Meanwhile, tension builds between Teyla and some of the other members of the Atlantis team over her connection to the Wraith. Major Sheppard steps in to defend her, but even he begins to harbour doubts when a team member is left unconscious after an attack by an unknown assailant.