As the returning Robotech Expeditionary Force (REF) prepares to retake the Earth from the Invid, Vince Grant and the crew of the Icarus is sent in search of the missing Admiral Rick Hunter and the SDF-3 after their transmission is cut off. Unknown to the REF however, a new alien menace has begun their plan to eliminate all races that use Protoculture - Human and Invid alike.
