An alien ship crashes on Earth and the secrets it bears lead Earth into three interplanetary wars.
Scott's group joins the Robotech forces in the attack on Reflex Point, but differences of opinion threaten to split the group at a critical time; Marlene comes to terms with her Invid identity of Princess Ariel and aids the freedom fighters.
Scott battles Corg while Lancer and Sera defend the Invid hive long enough for the Regess to gather her brood and make a final bid for survival.
Adm. Gloval promotes Lisa to captain and gives her command of the SDF-2; Rick comes to a decision between Lisa and Minmei; the Earth forces sacrifice everything in their counterattack against the ruthless Khyron and Azonia.
Fifteen years after the battle with Khyron changed the course of humanity's future, the United Earth Forces Military Academy celebrates the graduation of its first class; graduate Dana Sterling tells the story of how her parents, Max and Miriya, met.