Legends. Set in a near-future, dying Earth, Anima Squad defends the planet from an ancient high-tech army of aliens known as the Primordians. Cast from dry land, the Primordians bided their time deep beneath the sea, biding their time for centuries… until they could no longer abide the surface-dwellers any longer, nor their abuses of the planet. Thus the Primordian Queen's judgment was made: humanity's era in the sun is over, and that of the Primordians has only just begun.

When the Primordians first attacked, humanity was unprepared—until Anima Squad formed to become its last defense. But they are safe no longer, for the Primordians evolved in turn. Their apex being is called Aatrox, whose understanding of humanity only furthers his hatred. His flesh has no limits, his sword no mercy. He is the harbinger of Anima's end.