Gu Chen, who came through the book, had a fate full of thorns since he was born. In order to eradicate the roots, his enemies threw the infant into the extremely dangerous Cave of Ten Thousand Demons. In a desperate situation, he accidentally fell into the devil. With his extraordinary resilience and the opportunity of the devil's cave, he counterattacked and became the feared son of the devil. Eighteen years later, the leader of the Qingyun Immortal Sect and the Saint of Yaochi came to find him and revealed the truth about his life experience. It turned out that he was actually the lost biological son of the Immortal Sect. After returning to the sect, Gu Chen had not yet adapted to the life of the immortal sect, but he encountered various provocations and exclusions from the adopted son of the sect master. The struggle between the identity of an immortal and a demon, and the entanglement of life and grudges officially began.