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 hope of getting some information regarding earth's knowledge of protoculture.

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.

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 calling themselves earthlings, or if they should continue to concentrate on recovering their precious protoculture before the Invid, the mortal enemies of the Robotech Masters, come looking for their next meal of protoculture matrix – something they call "the flower of life."

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. What they don't realize is that they are falling into a trap set by the Robotech Masters as they also need to get information concerning their new enemy and to determine how much this civilization knows about the mysterious substance known as protoculture."

After successfully shooting down the giant alien ship, a ro-con mission is called for. Once again Dana's group is volunteered for the dangerous mission. On the eve of this dangerous mission, the members of this courageous squad prepare for battle, each in his or her very own way.

A gigantic Flagship from the Robotech Master's interstellar armada is flying closer and closer to the earth. It is decided that a direct offensive against the battleship is needed. Dana Sterling's 15th Tactical Armoured Corps is called into action to solve this new crisis.

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.

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, earth's only link to the Robotech defenders who have gone into the cosmos in search of their homeworld.

Rick and Minmei find themselves trapped inside an unexplored area of the gigantic Space Battle Fortress.

A counter-attack by the United Earth Forces causes the Robotech Masters to re-evaluate their plans to regain the protoculture factory. Although there are no precise winners, the battle lines are being drawn.

The Robotech Masters have finally arrived near the vicinity of the earth. They are so certain that there will be no resistance offered as they try and recover their lost protoculture factory that the strong fighting spirit offered by the citizens of earth confuse the zealous interstellar techno-voyagers.

It is fifteen years later and Dana Sterling, the child of Miriya and Max Sterling, recalls the turbulent romance that her parents had in order to put to rest the fears of a new recruit in the Army of the Southern Cross, the earth's latest defense force.

Admiral Gloval has ordered Lisa Hayes to command a new version of the Robotech Space Fortress, the SDF-2, and undertake a new mission to search the far reaches of space and discover the true homeworld of Robotech. Khyron has other plans for the SDF-2 and original SDF-1.

The Christmas season serves as a backdrop for Khyron's plans to steal the earth's remaining supply of protoculture matrix. Many of the complex relationships developed over the past episodes are coming to a resolution.

Minmei tries to become part of Rick Hunter's life again after returning from her tour of the frontier. It is a situation complicated by Rick's growing concern for Lisa and his final realization of his duty as a soldier.

Claudia gives Lisa a lesson in psychology as she recalls the early stages of her romance with the late Commander Roy Fokker. A touching flashback sequence.

In a totally unexpected move, Khyron has managed to capture Minmei and Kyle. He holds his micronian prisoners for ransom; the price for their freedom is the earth's gigantic Robotech vessel, the SDF-1.

The evil Zentraedi warlord, Khyron, plots to persuade the surviving micronized Zentraedi to re-join the ranks of the elite guard of the Robotech Masters now under his command.

Breetai organizes a raid on the last remaining Robotech factory in order to try and hold the upper hand in case the wandering Robotech Masters do eventually find their way to the earth.

In order to avoid the total destruction of the earth, the crew of the SDF-1 make an untested jump into hyper-space.