Yin Sheng, the Black Panther King of Kunlun Mountains five hundred years ago, was demoted to the lower world after causing trouble in the Heavenly Palace. He was reincarnated as a human being and was entrusted by Guanyin Bodhisattva to become the mysterious protector of Monk Tang on his journey to the west. A thousand miles away, he slayed demons and slain demons, but he was also burdened with the sins and merits of the reincarnation. After his journey to the west was successful, he gave up the path of immortality and chose to stay in the human world, becoming the "True Lord Protector of the Country and Assistant Saint" of the Tang Dynasty. However, he was involved in a greater disaster - Wu Zetian, a talented man from the Qingdeng Ancient Buddha in Ganye Temple, was burdened with the destiny of Tianfeng, unwilling to accept it, and vowed to break away from the prison of destiny. From the deep palace to the court, from the queen to the empress, she managed every step, gaining power over the world, but she also faced disaster at every step. Yin Sheng originally wanted to stay away from the mortal world, but because of a ray of Tianfeng's true essence, she was connected to her destiny. From then on, she protected her, taught her, guarded her, and accompanied her through the bloody road to heaven. In a world of chaos without heaven, the Three Realms will collapse, Lingshan will fall, and Heaven will be in danger. Yin Sheng led the Taoist and Buddhist monks, teamed up with Wukong and Yang Jian, and used the fortune of the Tang Dynasty to create a star array in the sky. Wu Zetian used the blood of Tianfeng to help him recreate the Sky-Mending Formation and fight to the death with the devil. After this battle, she became the empress of the ages and created the prosperous age of heaven; but his soul was broken, leaving only a ray of remnant soul, which was placed in the Bodhi tree and made a promise of a hundred years. After a hundred years of solitude, she sat alone in the bright hall, guarding the bead, talking to herself in the void, waiting for his return. And he turned into a knight in black, hiding in the city, exterminating demons and bringing peace to the people. In a corner that she couldn't see, he guarded the city she loved and the country she protected. Until the hundred-year appointment is approaching, on the snowy night of Lishan Mountain, the bodhi seeds are shattered, and the stars across time and space finally meet - the guardian of the West, the empress of the human world, the catastrophe of the three realms, and the lonely guard for a hundred years.