A small group of elite survivors are voluntarily experimented on and given superpowers and these individuals are sent back in time by the remnants of various government and survivors alike to prevent the damning apocalyptic future that they all come from. The monstrous organization that birthed such a future are known as Nexus and are responsible for the downfall of humanity. With these individuals prevent this future or stand by helplesss as robots, aliens, and vampiric creatures continue to war over the earth.