On a planet condemned by a scorching sun, mankind lives in overpopulated cities below the surface. Only the disinherited are forced to survive on the inhospitable surface; they are called the "outer ones." This is the story of a beautiful woman, full of life, who joins forces with an escaped rebel in a desperate attempt to reach salvation in the legendary place called the "City of Domes." Their odyssey, however, is controlled by mysterious beings linked to the power of the "Mega," an entity who is much closer than they imagine.