Teens Jack, Marco, Aly, and Cass begin a quest to find seven pieces of Atlantis' power that were hidden long ago and that will, if returned to Atlantis, save them from certain death due to the genetic abnormality that also gives them superior abilities.
Racing against time to unearth the last four Loculi, Jack and his friends prepare for battle against the seven ancient wonders as well as the Massa who have taken over the Karai Institute and convinced Marco to change sides.
Journeying to the ancient city of Babylon when Bhegad tracks down Marco, the companions face a daunting choice involving a dire trap and a long-lost figure from Jack's past.