After Stargate Command uncovers the ancient city of Atlantis in the Pegasus Galaxy, Dr. Elizabeth Weir and Major Sheppard spearhead a scientific mission to explore the deserted metropolis. Upon arrival, the team discovers they are cut off from Earth and inadvertently revive the Ancients’ formidable adversaries, the Wraith, who are eager to hunt them. With the assistance of new local allies such as Teyla Emmagan, the Atlantis team embarks on a quest to unravel the mysteries of their new home while simultaneously battling for survival against the Wraith.