At the edge of death by the sea, Liu Ruyan, sect leader of the Heavenly Sword Sect, lies on the verge of death in her disciple Gu Ning's arms. Gu Ning burns his soul and perishes alongside the three sect traitors who were hunting his master. When he opens his eyes again, another soul has taken possession of Gu Ning's broken body. The baby beside him turns out to be his original body's master. With his spiritual roots shattered and unable to cultivate, he quietly raises the baby until she grows up. After eight years together, she calls him Master, unaware of the past hidden behind that title.