If one day, you find that the strong people in this world are everywhere. If one day, you find that you have become the abandoned son of your parents. If one day, you find that you have been sent to a deserted ancient city. If one day, you find that there is a sign-in system in your mind. If one day, you find that you have become accustomed to the ordinary life, troubles will suddenly begin to follow. How do you decide? Should you go against the current or go with the flow? Everything is in your control.