The Earth Alliance prepares itself for a new war. Two old enemy's have allied themselves with Regal, the planet the Arwen saved two years earlier, to build a massive Armada assigned to destroy Earth. Vice Admiral Payton Cook must defend the planet against insurmountable odds while Captain Cook does battle to save Ulliam from a deadly surprise attack.

The Arwen: Season 3 is the final chapter of the Gyssyc trilogy which started with the Parsec award winning novella, the Arwen: Season one Regal, and continued with The Arwen Season two: Ulliam.