Using small ships discovered in the city, team members fly and discover the mainland, where they explore, meet the indigenous population, and learn that the Pegasus galaxy is dominated by a terrible enemy known as the "Wraith." Although first encountered whilst in a long-term hibernation state, the expedition unintentionally and prematurely wakes the Wraith, alerting them to the reemergence of Atlantis, a new race of humans, and a potential new feeding ground: The Milky Way galaxy. Despite being vastly outnumbered, the team must defend and protect the city, the locals, and the entire expedition.