With the entire city ordered to take a personal day the team does their best to unwind and enjoy their leisure time. Without warning a mysterious explosion rips through the city killing and injuring unsuspecting citizens. Dr. Rodney McKay and Dr. Carson Beckett arrive on the scene to find Teyla critically injured by shrapnel from the explosion. Unable to find explosive residue, the only leads they have to go on are eyewitness accounts saying one of the base-scientists just suddenly exploded.

After helping relocate the Taranans, the Atlantis team realizes they haven't heard from the village in an unusually long period of time. Wondering what happened to them, Weir sends Sheppard and his team to go investigate their village. Once there, it appears the Taranans have just abandoned their village until Rodney McKay detects life signs well beneath the surface in the remnants of the previous village's underground industrial complex.