On a snowy night beneath an old locust tree, two girls with no blood ties made a promise to meet again in ten years.
> Shen Qingshuang traveled north to the Xuantian Sword Sect to cultivate an icy heart and prove her path through the sword. Su Wenjun traveled south to the Hundred Herbs Immortal Valley to study the life-giving ways of herbs and heal the world.
> They were neither sisters nor lovers, but each other's only confidantes. After parting, they trained along their own paths, rising from humble disciples to become the new sect leaders of the Xuantian Sword Sect and the Hundred Herbs Immortal Valley.
> Every ten years, they met in Frost City. For three hundred years, snow and the fragrance of herbs intertwined. When the calamity of the riven heavens arrived, the strongest sword of the northern frontier stood shoulder to shoulder with the most compassionate healer of the southern lands.
> This is a serious coming-of-age story with two female leads, no romance, a bond between unrelated confidantes, and a reunion at the summit.
> Northern snow and southern herbs, different paths leading to the same destination.
Theme: To portray the independent, pure, profound bond between women, one that depends neither on blood ties nor romance; to explore how different paths, whether killing or protecting, icy cold or full of life, can lead to the same destination; and to convey the values of keeping promises, each ruling her own domain, and meeting again at the summit, along with the boundless compassion of healers, which knows no north or south.
