The planet is still scarred by radiation, rising seas, and a mysterious alien substance known as Muk. Out of the ruins, the Peace Assurance Council (PAC) has grown into a militarized regime, ruling the oceans with ruthless control. On land, the last remnant of the old world, Ant City, stands behind its protective shield, carrying the hopes of those who still dream of freedom. As tensions mount between these two forces, the fragile balance of survival is on the edge of collapse.