Shen Zhao returned to the night shift at the funeral home, and the tattoos on the ankles of the thirteenth shoeless corpse were exactly the same as those on his mother's body. Forensic psychologist Bai Yan was ordered to investigate, but found that all the deceased had appeared in the same burned file. Cleaner Grandma Chen secretly wiped the shoe rack late at night, intern Lin He's live broadcast accidentally recorded key tattoos, and supervisor Zhou Qizhou accelerated the burning of the remaining evidence. When the seventh pair of shoes was found in the ventilation duct, Shen Zhao finally understood: someone was putting on shoes for the deceased, just to let them "walk decently".