The Underworld Begged Me to Cleanse My Grievances, and I Sanctified Them with My Grievances.

The protagonist Ling Jue cannot be reincarnated due to an eternal injustice. In order to use the energy of his injustice to maintain order, the underworld begs him to clear his injustice. Ling Jue refused to compromise, used injustice as a weapon, and worked his way up from a "nail house" step by step, eventually exposing the underworld's shady secrets and becoming the master of reshaping the order of the Three Realms.