Li Xia travels through the world of immortality, but shares his body with Shu Qiuqiao, a pure and kind female soul, and controls her in turns every day. One is the sharp blade of protection and believes in "eliminating all evil"; the other is the glimmer of light that saves people and insists that "the Tao is in the heart". From the first meeting in Lingyang Palace, the doubts in Danyang to the disputes over spiritual veins, the two of them grappled for balance in the test of life and death. This journey of cultivating immortality is a collision of sharpness and benevolence, and it is also a journey of inquiry and growth together - true strength lies in having the power to destroy everything, but always having the tenderness of protection and compassion.