The Robotech Expeditionary Force had been stranded on the far side of the galaxy as the result of damage to their Super Dimensional Fortress during the battle with the Invid hordes. Their chances for survival were slim. Suddenly, a starship unlike anything that had ever flown before appeared — manned by an incredible assortment of beings who meant to challenge the might of the Invid Regent himself! REF volunteers signed aboard, with their might war mecha in tow, for a campaign that would either mean the total destruction of the freedom fighters or liberty for the planets of — The Sentinels

The Global Civil War was about to make Humankind extinct, when the stupendous Super Dimensional Fortress dispatched to Earth by a dying alien genius changed all that forever. Humanity's only hope lay in a corps of untried young men and women gifted with powers they didn't fully understand. Then the most feared conquerors in the universe attacked, determined to destroy them for no reason they could comprehend