Li Yan, an ordinary young detective, accidentally obtained the "Myth Key" while chasing a thief, which opened the door to the mythical world. He teamed up with the fox demon girl Bai Zhi and the cute mythical beast Shi Buzhuan to make trouble, solve strange cases, resist powerful powers, and unlock seals in the mythical world of the Nine Realms. From Xiaoqiao Jiangnan to the Immortal Realm, Jiuyou Underworld, and Gaotian Divine Realm, there are adventures, farces, and dangers all the way. The trio are both enemies and friends, gradually breaking down the barriers between gods and demons, and getting acquainted with all kinds of gods, demons and monsters. The great battle surrounding the ultimate treasure "All Souls Cauldron" tests everyone's courage and sincerity. After misunderstandings and reconciliation, friendship, love and growth are intertwined, everyone breaks fate together, and finally works together to solve the crisis of heaven and earth, smiling at the gods and retreating to the world.
