Who Is the Murderer? Police?

In a peaceful and peaceful small village, everything was so simple and ordinary, until the arrival of a tourist group, everything changed drastically. They "explore the maze" here, "play happily" here, and get stuck in the deep. A series of disappearances make them nervous, until the appearance of that person breaks the deadlock and everything becomes calm again. But after a while, someone disappeared inexplicably. Who is the murderer... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.