I Have a Soul in the Mirror

Have you experienced anything like this? When walking in the dark, I always feel like there is someone behind me; when I look in the mirror at night, the person in the mirror is obviously me, but I feel strange... That night, Xiao Qiang's parents disappeared mysteriously, but he accidentally learned from the mirror that there was an invisible person beside him. From that day on, all kinds of strange things happened around him...