Zhou Chu, a modern-day overworked corporate drone, transmigrates into the notorious constable of the Great Jing Dynasty and immediately finds himself trapped in a deadly predicament by a black boar demon. At the critical moment, he awakens a lifespan system that allows him to burn his own years of life to instantly bring martial arts techniques to perfection. By slaying demons and monsters, he can even plunder their lifespans to crazily deduce and improve his cultivation techniques! The price is that he himself has only one year left to live! He maxes out the Evil-Slaying Blade Art, Primordial Chaos Golden Bell Shield, and Mad Thunder Incinerates Heaven Blade Formation by spending his lifespan. From a junior constable in Qingxi County, he fights his way to Jingzhou, the capital, and Demon-Suppressing Pass, smashing through the realms of Qi Gathering, Profound Understanding, and Dharma Form one after another. How can he survive with only one year of life? There is only one answer: kill more demons and seize more lifespans, paving his path to immortality with the lives of demons and monsters!