"Alexis is an archeologist. In 2999 this doesn't mean the same as it did in 1999. The world has changed, and humans are no longer wondering whether or not they are alone in the universe. The evidence of extra-terrestrial life, intelligent extra-terrestrial life at that, has been discovered, right here on earth.
It's Alexis's job to piece together the puzzle left by human civilizations over millennia, clues left by our ancestors about the ones who came from the sky. She believes that if the earth is to know its future, it seems imperative that the World Government knows if there is an intergalactic agenda for the earth that could affect this future."