When a secret base, abandoned by the original builders of the Stargates, is found buried in the ice of Antarctica, the newly formed Stargate Atlantis team is born. The team's discovery leads to a daring expedition to the distant Pegasus galaxy, where they encounter a primitive human civilization and a sinister new enemy that threatens human life everywhere. The Stargate Atlantis mission is headed by Dr. Elizabeth Weir, a specialist in diplomatic relations. Her political savvy is balanced by the bravado of her military counterpart, Major John Sheppard, a courageous pilot. Rounding out the crew are Lt. Aiden Ford, Sheppard's second-in-command, Dr. Rodney McKay, a clever and quick-witted astrophysicist, and Teyla, a beautiful young leader among the primitive alien civilization that the Atlantis team encounters.