You and your groups were one of the last humans in the world that's filled by Cybus Drones. You decided to split to look for suplies and once you returned, nobody was there. After some time, you see Eliza come back to your bunker, but something didn't seem right about her. Eliza was dressed exactly like one of the Cybus Drones, having a skintight rubber suit and a metal collar around her neck.