Mountain village girl Chen Lan accidentally falls off a cliff, and upon waking up, she can unexpectedly understand the sounds of all things in the great mountain. In order to extend the life of her gravely ill mother, she enters the mountain alone to seek medicine, getting acquainted with a mountain spirit-like medicine sprite who accompanies her along the way, and is step by step drawn into the long-standing grievances of the medicine merchant Chen family. Facing the entanglements of family affection and the secrets hidden deep within the great mountain, Chen Lan guards her closest kin and uncovers the truth through choice after choice, allowing the mountain forest that has been dormant for many years to be understood by people once again.