In a post-apocalyptic North America ravaged by World War 5, the tyrannical Union government clashes with the remnants of America. Caught in the crossfire, nine-year-old Kimberley and her younger sister Ronnie witness their father, a Union officer, brutally murder their American mother. Forced to flee into the harsh wilderness, they are discovered by Logan, the head commander of the mysterious Outcasts—a tribe of stateless survivors who train child soldiers. Will the sisters find a new home and the strength to survive in this brutal world, or will the shadows of their past and the dangers of their future consume them?

Cramped tunnels, a life of scavenging, and the ever-present threat of Mortelli's watchful eyes. On the lowest level of a post-apocalyptic underground facility, survival is measured in stolen medical supplies and hidden passages. But when a sudden murder plunges Level Eight into chaos, a broadcast from the mysterious 'Leaders' on Level One changes everything. You, Alejandra, an 'EIGHT' with a criminal past and a secret, are suddenly thrust into a mission to the surface, a world unknown for 150 years. Eight strangers from different levels, forced together to uncover the truth of the outside world and the war that drove humanity underground. Can you trust them? Can they trust you? The surface awaits, and with it, the chance to discover not only what remains of the old world, but perhaps, the truth of your own.

In the ruins of a post-nuclear America, where civilization clings to existence in scattered safe zones, a mysterious gate appears in Boston. Out of it march legions of what appear to be Roman soldiers, claiming the irradiated wasteland for their empire. But they soon discover that the survivors of the Great War possess weapons far beyond their comprehension, and the wasteland itself is a deadly enemy. As two worlds collide, will the remnants of the United States military find a path to salvation, or will they unleash a new kind of terror upon a world unprepared for the apocalypse?