Eight boys decide to spend a night of fun in the forest. Only seven return. Felix Lee. That's his name. He didn't return from the forest that night, and nobody knows why. Each boy has their own opinion, none of them think another murdered him, but the press wants answers, and so does Bang Chan. Persuasion doesn't work, and he takes it into his own hands, only when fate seems to align, does he get his way. The group gets a letter, each one different, but with the same meaning. "I know what happened to him." Desperate, they listen and follow what it says. In a fluffy of events, terrifying them and testing each one's trust, making them question a lot of who they are and who they think they are, they discover the truth. And oh boy is the truth wronger than they thought.