Chase Collins and classmate Claire Ashton are transported to an apocalyptic wasteland, where they unlock a Survival System to travel between the doomsday world and campus. They battle zombies and awaken superpowers, taking advantage of their trips back to stock up on supplies. The Eternal Legion and a mysterious pharmaceutical corporation push the pair into dual crises. As they gather Spatial Beacons, the hidden connection linking the two worlds comes to light.