Source of Light: the Truth in the Mist

In an ancient town called "Misty Hidden Town", it is shrouded in thick fog all year round, as if it is isolated from the world. There is a legend circulating in the town: every ten years, a bizarre disappearance occurs in the town, and the missing people seem to be related to a mysterious "Eye of the Mist." This legend has never been confirmed, but residents of the town firmly believe it.