In the isolated Kirishima Island, which is shrouded in thick fog all year round, the residents of the island follow a strange set of century-old rules - they must collectively "keep the lights" on the fifteenth day of every month. Anyone who violates the rules will be looked down upon when they disappear in the fog.
The moment he awakens with his strong ability to observe details and reverse reasoning - the ability to sniff out flaws in the details of life that others ignore, the gears of fate begin to reverse.
Facing the older generation of conservatives on the island who use rules and violence to block the truth vs. Shen Zhiyi breaks the taboos one by one with the guidance of anonymous letters and reveals the truth about why her parents fled Kirishima. , Shen Zhiyi relies on his super detail observation and reverse reasoning ability - he can sniff out flaws in the details of life that others ignore. He rises step by step and crushes all those who once looked down on him.
