The year is 2201, one year after the Star Force returned to Earth with the CosmoDNA which removed the Gamilon radioactive pollution that was threatening all life on the planet. The Comet Empire prepares to begin its assault on unsuspecting Earth. We learn that Desslok of Gamilon is still alive, and in league with the Comet Empire.

Most of the Star Force crew members are now on Earth. The Argo (with Wildstar and Homer) is returning from remote patrol duty in the solar system. On the way back to Earth, the Argo receives an encoded message amidst a huge electromagnetic power surge. It is not yet known whether the surge was used to send the message, or to jam it, or for some other purpose.

During the surge, the Argo is attacked by an unidentified squadron of fighter planes. With its radar damaged, the Argo has a near collision with the new Earth Defense flagship, Andromeda, which refuses to give up its flight path for the incoming Argo. The two ships scape by each other, and the Argo lands on Earth.