Deep in the dark forest, everything is quiet and there is no light. Youlan, a forgotten mysterious forest guard, has the ability to be isolated from the world - she can listen to the whispers of trees and see into the souls of living things. However, since night falls, a strange song begins to circulate in the forest. Whenever the moonlight shines, indescribable creatures quietly appear among the branches and leaves, corroding the origin of all things. Youlan struggles between protection and understanding: drive these aliens out of the forest, or uncover the truth behind them? She gradually discovered that these creatures were the embodiment of the ancient will of the forest and the mirror image of her own soul. In the journey of exploration and struggle, Youlan must face her deepest fear and decide whether to dance with the darkness or ignite a glimmer of light. Fantasy and reality are intertwined, and in the fog, the pendulum of fate is swinging undecided. Only Youlan's choice can determine the future of the forest - eternal sleep or rebirth at dawn.