Former Demon Lord Ling Chi breaks the seal and returns with his cultivation entirely lost, starving to the point of applying as an assistant at an odd-jobs agency for "meals and lodging provided." Boss Su Xiao is a half-baked Qi-condensation amateur, yet blessed with koi luck, using black donkey hooves and frying pans to "physically exorcise demons." Together, they take on orders and bicker along the way, as Ling Chi transforms from a cold-faced demon lord into a working stiff who falls hard for braised pork belly. Until the immortal realm arrives to welcome the reincarnation of Fairy Yaoguang and trouble brews endlessly in the demon realm, their hands join to burst forth with chaotic energy, only to realize immortals and demons can also gently blend together. Ultimately, the "Xiao-Chi Odd-Jobs Agency" opens for business, with the demon lord willingly acting as chief assistant, holding his boss's hand, letting go of grievances and the past, and desiring only to live out a simple daily life where someone takes care of his meals.