This novel unfolds from the perspective of Mo Yuan, telling his experience in Kunlunxu when the world first opened. As the legitimate son of God the Father and the God of War, he took on the responsibility of guardianship and recruited many disciples. Si Yin disguised herself as a man and came to be her apprentice. Mo Yuan knew it but did not reveal it. From then on, her appearance shone like a star into Mo Yuan's heart. Si Yin's liveliness and enthusiasm for cultivating immortals and playing the piano made Mo Yuan gradually fall in love with him during his teachings. During the time they spent together in Kunlunxu, there was laughter and growth. Mo Yuan was entangled between his teacher's responsibility and his personal relationship, and the tension between the Tian Clan and the Wing Clan was also shrouded in a haze. Where will this relationship go as it intertwines with the grand world of immortals and complex fates? Let's see how Mo Yuan chooses between responsibility and love, and how he copes with the changes in the world.