Forest ranger Lin Shen discovered an unidentified body during a routine inspection. The mysterious symbols left at the scene involved him in an unsolved case that spanned twenty years, and this murder was actually related to his father who had been missing for many years. When Lin Shen investigated in depth, he discovered that the entire forest seemed to hide secrets-the twisted trees were silent witnesses, and the legendary "Eye of the Forest" was watching his every move. As the truth approaches, Lin Shen must solve this dark mystery that coexists with the forest before the murderer acts again.