This world is called the "Lock Domain" because every native intelligent life will have one or more "soul locks" in a certain part of the body from birth. According to ancient legends, the Locked Realm was once a free place without soul locks. A disaster known as the "Great Imprisonment" struck, and mysterious power swept the entire world. From then on, all new creatures wore soul locks, but Ren Feng who came through time was an alien in the lock domain---"the Unchained One."
