The Robotech Masters bring the war to Earth, as they attempt to reclaim their lost Protoculture. The 15th Tactical Armored Corp is put to the test.

The United Earth Defense forces plan a daring mission which could decide the fate of the entire world! Answering a call for volunteers, Dana Sterling offers the services of the 15th Tactical Armored Division in an operation to reestablish communications with Earth's triple satellite com-link, Space Station Liberty. The assignment throws Lt. Sterling & her squad into the lap of Marie Crystal, Dana's friendly rival. The action is heavy as this band of Robotech Defenders work together toward a common goal.

The Robotech Masters try to establish a base on Earth, near the vicinity of the fallen SDF-1. Once here, under the direction of Zor Prime, the alien force hopes to extract the Earth's remaining supply of Protoculture. A routine patrol for Dana & Bowie turns into a nightmare.

The war against the Robotech Masters has escalated into a serious military confrontation, with neither side willing to make even the smallest concession to avoid turning the planet Earth into a living battleground. The United Earth Defense Forces plan to take the battle into space, to protect their homeworld and challenge their alien foes. Using the main bulk of their Tactical Armored Space Corp, the Robotech Defenders plan to test the mettle of their mysterious enemies.

The war returns to the Earth, as the Robotech Masters press the attack. The control of Protoculture is essential, if the Robotech Masters are to maintain their hold on the interplanetary syndicate that they've created. And so, a battle which starts out with regimented discipline, and high hopes for victory on both sides, degenerates into a brutal and undefendable, high tech brawl.

Dana Sterling leads her 15th Tactical Armored Corp, into the fallen flagship of the Robotech Masters, in daring recon mission ordered by the supreme leaders of the United Earth Defense forces. This military tactic was anticipated by the Robotech Masters, who relish the opportunity to capture a few human specimens, dead or alive!

Dana Sterling tries to keep her mind on business, while she struggles to shake off the aftereffects of a near fatal meeting with the warriors of the Robotech Masters. Her mind fills with haunting memories, which lead her to believe that she is related in some strange way to the mysterious aliens who have come to Earth to claim their lost Protoculture Matrix.

The Robotech Masters subject human prisoners to a series of mental probes, to determine the extent of their knowledge of Protoculture. Their concern is twofold: without Protoculture, their civilization will crumble; and eventually their archenemies, the Invid, will sense the presence of Protoculture on Earth... and come looking for it!

An advanced recon vessel blasts into the vicinity of Earth from hyperspace, only to find their home planet surrounded by an armada of gigantic alien warships! Unable to make contact with Earth, and remembering what happened to their planet in the past when it was invaded by the Zentraedi, the crew of this heavily armed starship make a desperate decision, to meet the alien armada with a surprise attack. The outcome of their effort is uncertain.

Lt. Nova Satori begins a complex psychological profile on a captured alien Bioroid pilot, identified only as Zor. The Supreme Command of the Army of the Southern Cross believes that the debriefing of this particular alien, might provide them with the key to unlock the riddle of this new interstellar war. Meanwhile, Dana practices on a battle simulator hoping to explain her empathy for this captured alien, and to end any doubts about her ability to defend the planet.

It is decided to induct Zor into the Army of the Southern Cross, in the hopes that an association with a military environment would spur his lost memory, and provide some important clues to the origin & tactical strength of the Earth's powerful and mysterious interplanetary enemies, the Robotech Masters. Lt. Dana Sterling relishes the assignment of turning Zor into a human being! It is an assignment which brings her closer to solving a personal mystery surrounding her own origins, as well as giving her an opportunity to test her charms as a woman on an unsuspecting subject.

The United Earth forces pull together to mount a full scale attack on the armada of the Robotech Masters. Dana Sterling & the 15th Tactical Armored Division are left behind. It is a plan masterminded by Commander Leonard, a command that did not pass by the mysterious Robotech Elders.

The control of space in the immediate vicinity of planet Earth forms the battle strategy mapped out by Supreme Commander Leonard, as he forces his entire fleet of cosmic warships to engage the armada of gigantic alien battle cruisers in combat. It is the classic situation of David & Goliath, only this time, the legendary rock hurled by David is a massive barrage of laser cannons and powerful proton torpedoes! The Second Robotech War may not turn out the same as the first. The Robotech Masters are playing for keeps, with their entire civilization at stake the odds are too great to permit failure.

The intergalactic war takes a back-seat, as personal conflicts surface in the Army of the Southern Cross. On the eve of a major battle, Marie Crystal is haunted by the vision of her boyfriend Sean Phillips fraternizing with several beautiful women. To Marie, the enemy has become the green eyed monster... jealousy! She sets out on a one-woman crusade to paint the town red, no matter what the cost.

Rolf Emerson leads the Tactical Armored Space Corp into battle with the Robotech Masters. A new Robotech device, born in the convoluted mind of Corporal Louie Nichols, is pirated by the Military Police for use as a tactical weapon! Resentment is cast aside, as the anticipation of the battle begins to affect the 15th Squad of the Tactical Armored Corp.

A battle rages between the Robotech Masters and the entire interstellar fleet of the United Earth Government! It is a crucial battle, which could decide the fate of the two civilizations. Utilizing advanced weaponry, and fighting with renewed vigor, the stage is set for a battle royale.

Dana Sterling & the 15th Tactical Armored Corp are held prisoner, captives of the Robotech Masters. During their imprisonment, many secrets concerning the true nature of the Robotech cloning process are uncovered!

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.

The survivors of a critical battle against the armada of the Robotech Masters, return to Earth. Bowie gets his friends in the 15th Squad to help him smuggle his newfound love, Musica, past the Military Police, but the plan backfires, requiring Bowie & Musica to flee for their lives!

Bowie & Musica become fugitives, fleeing from a trap set for them by Nova Satori. At the site of the SDF-1, amid the wreckage of the First Robotech War, they make a startling discovery concerning the nature of Protoculture, and the relationship of this mysterious energy force to the Invid. Learn the secrets of the Invid Flower Of Life!

A desperate situation calls for extraordinary measures by the 15th Tactical Squadron, and the mysterious Zor, if the Earth is to survive the final offensive mounted by the Robotech Masters, as they try one last time to recover their rapidly mutating supply of Protoculture, before the arrival of the Invid.