When the operating rules of "Utopia" depend on a cold "screening", how will the outsider who discovers the truth face the "gentle murderous intention" of the entire community? With beautiful mountains and clear waters, simple folk customs and no criminal record for ten years, it is a paradise in the eyes of the outside world. The townspeople are gentle and polite, live at a slow pace and are full of mutual help. The "purity" of the town stems from an ancient and cruel contract - through the annual "Heart Purification Sacrifice", a "sinner" is banished to appease the "wrath of the mountain god" (or maintain a certain resource/balance). This tradition has evolved into a sophisticated, hypocritical set of modern rules. All adult townspeople submit a name anonymously, with nominations based on "potential threats to the harmony of the town" or "evil intentions at heart." The selected "sinners" will be "gifted" to the forbidden area in the back mountain on the night of the winter solstice, where they will fend for themselves and never return. The whole process was full of ritual, and the townspeople looked compassionate, as if they were performing a "sacred duty" that they had to do.
Concept: When the operating rules of "Utopia" depend on a cold "screening", how will the outsider who discovers the truth face the "gentle murderous intention" of the entire community?