Predator or Prey

"Sometimes the world's greatest predator, is its smartest prey." Never seen nor heard. Always out of sight, just beyond the eye's sight. Humans living outside the walls. The thought was an impossible one, but just because they are never seen does not mean they are not there. It just takes the right forces to nudge them into the open. Rated M for later chapters. Levi/OC, Reiner/OC