An alien ship crashes on Earth and the secrets it bears lead Earth into three interplanetary wars.
Two years after Dolza's attack destroyed Earth's cities, the survivors rebuild and adapt to their new way of life; Rick makes a discovery while out on patrol; while Rick and Lisa's friendship strengthens, Minmei and Kyle begin to grow apart.
A new threat learns of the battle at Earth that decimated the Zentraedi forces and becomes interested in the crashed battle fortress; the Zentraedi living on Earth gather in the wasteland, dissatisfied with peace and eager for combat.
While the Robotech Masters seek to resurrect the creator of Robotechnology, Breetai, Adm. Gloval and a joint Zentraedi-human team raids the last Robotech factory satellite in order to dissuade the Masters from attacking Earth.
Kyle organizes a protest to stop the military from deploying to protect the last protoculture chamber, but Khyron and his rebellion stage an attack during Minmei's concert to retrieve the device; Adm. Gloval learns more about the Robotech Masters.