In a world of twelve shades of light and darkness, the hierarchical system is strict, and the upper limit of each person's life has long been predetermined. The higher the rank, the longer they can live. Only by killing the undead tribe and elevating their rank to obtain the life scale can they truly achieve immortality. Having a resilient personality and outstanding talent, but born at the bottom of the world and unable to even touch martial arts skills, he suddenly received a relic and will from a deceased person.