Story summary:
1. Yu Qingshuang traveled through time and became a cold master, and rescued the bullied Yun Zhao during the apprenticeship ceremony.
2. The "Ruthless Sword Technique" practiced by the original master conflicts with the heroine's nature, causing the cultivation to stagnate.
3. Yun Zhao gradually opened up his heart under the abnormal care of his master, but developed morbid attachment.
4. Yu Qingshuang discovered that the Sword Sect's "Zhanchen Yuan" was actually a conspiracy to steal the disciples' talents.
5. Yun Zhao's life experience is exposed, and Yu Qingshuang confronts the sect in order to protect her beloved disciple
6. The surge of spiritual veins is coming, and the master and apprentice join hands to fight against Sword Sect and Netherworld Valley
7. In order to protect his master, Yun Zhao awakened the full power of Xuanyin Sword Body
8. Yu Qingshuang created "Sentimental Kendo" to resolve the opposition between good and evil
9. The two team up to rebuild order in the world of cultivation
