Demon Lord Ji Qianye, who once single-handedly stirred up the Three Realms, was tired of the life of fighting and killing, so she carefully planned a "fake death" to escape, and was reincarnated as an ordinary outer disciple in a small immortal sect. Her only pursuit in this life is to lie down, eat salted fish, and wait to die. However, the demonic instinct engraved in her soul caused her to overturn at every turn. She wanted to steal a spiritual chicken to make soup, but she managed to tame the sect's mountain beast; she wanted to find a place to take a nap, but ended up kicking open an ancient secret realm that had been sealed for thousands of years; she casually gave some advice to her good-for-nothing brother, and he suddenly became a peerless swordsman. Her series of "inadvertent" actions attracted the attention of Tianguang's No. 1 Immortal Lord, Gu Qingxuan, who came to track down the Demon Lord's remnants. An immortal who was supposed to be a model of righteousness and as cold as snow had his worldview repeatedly shattered after meeting this female disciple who "behaved strangely, had a mysterious strength, and had no ambition." In the process of Gu Qingxuan's transformation from suspicion and shock to "she is so special and I love her so much", the two of them worked together to uncover the shocking conspiracy behind the war between immortals and demons.