Three years ago, Secret Service ace Chen Du was betrayed by his boss Zhao Heting. He lost the opportunity to be promoted to "Sword Bearer" and was ruined. Three years later, an APP called "Part-time Evil Exorcist" quietly became popular. Users took orders to exorcise spirits, but they didn't know that every time they completed an order, they were sacrificing their lives for an ancient weapon called "Forbidden Killing". Chen Du discovered that Zhao Heting was the mastermind behind the APP, and the opportunity he lost back then was just the first step for Zhao Heting to cover up a hidden timeline.
