The night is quiet, especially the night in this small city. Only occasionally one or two dogs barked from the distant village. Cheng Xin suddenly woke up from her dream for some reason. She didn't remember what she had dreamed, but she only remembered that the dream was very scary. She naturally leaned her little body towards the place where her father slept, but it was empty. There was no one in the place where her father originally slept. Cheng Xin suddenly woke up, and she touched it with her hand again, but there was still no one. Cheng Xin sat up from the bed, and looked through the ray of light coming from the crack in the door. Except for herself and her brother Xiaosi, there was no one else on the bed. Cheng Xin timidly called out: "Dad, Dad." But the sound returned to her ears after being reflected off the empty wall.