When the "Migakure Ancient Town" turned into an absolute realm of rules and strange stories, warnings written in blood on the tourist code were all over the streets. Shen Qingqiu, the young inheritor of intangible cultural heritage Nuo opera, went to death in search of his missing master. While others were struggling to survive under strange rules, she held a cinnabar pen, put on a mask of inheritance, and spoke calmly to the ubiquitous "it": "Don't respond in red? That's a Yin boy getting married, and you have to spread glutinous rice." "Don't look at the shadow in the well? This is a soul-obsessing technique, which needs to be broken with a bronze mirror."... When the ultimate malice awakened on the ancient stage, she raised the lost mask and sang the sacrificial tune of severance. This time, she wants those behind the scenes to learn what the "rules" are.