The Hidden Tree, which protects heaven, earth, and the three races, is beginning to decline. Weighed down by an identity and mission handed to her by the heavens, Bi Han sets out on a long journey to find the Primordial Chaos and bring peace back to the world. The road is full of hardship and danger. She finds warmth in her nearest family and meets obstacles from the most wicked and perilous foes, yet companions stay at her side. However hard the trek becomes, she keeps singing as she goes.