Ling Qingsheng, the genius chief of the Lingjian Sect, cut off his natal spiritual sword to save his junior sister in her old age, and was poisoned by a strange poison. Her future as a swordsman was ruined. In order to gain a chance of survival, she was forced to practice the sect's secret "Heart Sword" which requires "cutting off love and desire", and forcibly froze the deep love she had endured for ten years and all the painful memories.
Three years later, she emerged from seclusion as a perfect, cold, almost inhuman "Heart Sword". In his late years, after three years of hard work in the Xijianchi, the sword's heart became clear. The two were ordered to go to southern Xinjiang to explore the traces of the devil, and shared life and death amidst poisonous miasma, ferocious beasts and desperate situations.
At the bottom of Chenxing Valley, resentful spirits surrounded her and poison invaded her body. On the verge of death, Ling Qingsheng's frozen inner defenses finally broke. In her later years, she also glimpsed the burning emotions and great pain that had never been extinguished under her "Heart Sword". The two confirmed each other's feelings in a desperate situation and broke the barriers.
This is not only a story about love, but also a questioning of "Tao". Explore the legitimacy of individual emotions within inherent ethics and rules; true strength comes from facing and accepting the brokenness and integrity of the heart; and the highest swordsmanship may be to deeply understand and control emotions instead of simply cutting them off.
This is a deep love that walks on the edge of a blade, a guardianship against death, a fairy tale about taboos and perfection, brokenness and reconstruction.