Some people want to forget but cannot forget, and some people do not want to forget but forget completely, just like some things cannot be said or done, but they are said and done. He is the immortal of Yingzhou, a fairy who is not stained by the world, but she happened to become his apprentice. He is the evil god who looks down on the world, and he is the devil who was willing to be imprisoned for her, but she happened to become his sister. Who on earth held hands with her on the banks of the ancient Surabaya River, and who spoke their hearts to each other in the endless years?