The Robotech Masters have finally arrived near the vicinity of the earth. They believe there will be no resistance offered as they try and recover their lost protoculture factory.
In order to accommodate vital military intelligence information, the Supreme Commander of the Army of the Southern Cross asks for volunteers to re-establish communications with an isolated space station.
On a routine patrol, Dana Sterling and Bowie Grant discover a plot by the Robotech Masters to excavate around the site of the final destruction of the SDF-1. Bowie is captured and it is up to Dana to affect his rescue.
The flagship of the Robotech Masters' interstellar armada is hovering menacingly above the earth. It is decided that a direct offensive against the enemy starship is needed.
After successfully disabling the Robotech Masters' flagship, a recon mission is called for. Dana's 15th Squadron is given this dangerous assignment. On the eve of this mission, the soldiers of the courageous squad prepare for battle.
Dana's 15th Alpha Tactical Armoured Corps succeeds in breaching the hull of the fallen alien vessel. They proceed through the gigantic ship in the hope of discovering any information concerning this new threat.
Failing in their attempts at capturing the humans who entered their ship, the Robotech Masters plot to raid a nearby city and capture as many humans as they can in order to experiment and see if they should fear this minor group of creatures.
Dana Sterling tries to get the war with the Robotech Masters out of her mind by attending a concert with Bowie. She meets a singer who she finds interesting only to discover later that he is a spy working for the military police.
The Robotech Masters plan a strange deception by introducing Zor into the ranks of the 15th Tactical Squadron of the Army of the Southern Cross in the hopes of getting some information regarding Earth's knowledge of protoculture.
Zor, the Robotech Master's unsuspecting spy, is subjected to rigorous psychological tests to determine if he is human. Dana cannot allow him to go unchallenged for the destruction he has caused and plans a daring midnight raid on the hospital.
General Leonard is convinced that Zor can help his army get information regarding the Robotech Masters (whether he is human or not). He assigns Zor to the 15th Tactical Squad and places Dana Sterling in charge of his "rehabilitation".
General Leonard calls for an all out attack against the Robotech Masters forces in Earth orbit near the moon. The plan does not include the 15th Tactical Squad, which spends most of its time trying to help Zor regain his memory.
Things on earth are settling into a pleasant domestic routine while the Robotech Masters and their bioroid army fights for their very survival against the pressure of the Tactical Space Corps of the Army of the Southern Cross.
Dana plays matchmaker for a shy captain crushing on Nova. A classic Cinderella story unfolds as Marie Crystal and Sean Phillips plan a dream date, but Sean's playboy past catches up to him and threatens his and Marie's future.
Louie creates a game-changing simulation system that promises to give the 15th Squadron an edge over the Bioroids. But Louie's Pupil Pistol is exploited by Leonard's cabal. General Emerson orders a risky Molecular Vacuum to save the fleet.
An all-out attack on the Robotech Masters' flagship is called for, this time including the ground forces of the 15th Squadron. Dana's team infiltrates the enemy ship, but learn their real enemy lurks within the ranks of their own squadron.
Trying to escape from the Robotech Masters, Dana and her friends discover many secrets concerning the true nature of the civilization living aboard the flagship of the Robotech Masters and the entire process of biogenetic engineering.
Outright rebellion becomes the first order of the day, as Musica and Zor reject the teachings of the Robotech Masters and turn to aid the human captives. It is a fantastic journey in ultimate truths for Zor, as his originator's memory comes back to haunt him.
Musica tries to assimilate herself into the "alien" environment she finds on earth. Her joy of discovery in this nNova tracks Bowie and Musica to the crash site of the SDF-1 and makes a startling discovery in regard to the nature of Protoculture.
Nova tracks Bowie and Musica to the crash site of the SDF-1 and makes a startling discovery in regard to the nature of Protoculture and the growing threat of the impending Invid invasion. Zor realizes that the Robotech Masters must be stopped at any cost.
Zor and the rest of Dana Sterling's 15th Tactical Squad make a daring trip to the Robotech Masters' flagship in order to rescue General Rolf Emerson, Bowie's guardian, and try and put a stop to the second Robotech Wars.
The final battle of the Second Robotech War is fought as Zor goes on the rampage to destroy the entire culture created by the Robotech Masters before the arrival of the Invid. His plan fails, causing his destruction.
