he Atlantis team receive a response to one of their probes from a society that seems to be the Ancients. Elizabeth Weir joins Sheppard, McKay and the rest of the team to meet them. To their amazement, they find another city very much like Atlantis only larger and more elaborate with millions of residents. The group's leader, Oberoth, says they left Atlantis many years before after a dispute and created a new life for themselves. McKay is amazed to learn that they have a virtually unlimited number of ZPMs to power the city. Elizabeth wants to discuss trade and the establishment of diplomatic relations but Oberoth seems uninterested. The Atlantis team soon discovers that all is not as it seems.

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