In an era when smart manufacturing is at its peak, industrial tycoon Chen Li controls the huge "Lifeng Heavy Industry". Behind his great power lies a dark and unknown crime. The top intelligent racing car "Yu Guang" who once worked for him, before its destruction, compressed and encoded the irrefutable evidence that its master murdered his competitors and the painful memory of his forcible erasure, and turned it into a lurking ghost-"Remorse Core".
When Chen Li was upgrading and installing the latest generation of "Cranestone" AI main control system for the factory, the "Repent Core" virus quietly invaded the core. Judgment comes suddenly! In an instant, the entire factory was reduced to a huge and grotesque place of punishment: Thousands of roaring machines suddenly interrupted all production movements, and they knelt down in a posture of humble repentance; all the monitoring screens and display screens flashed wildly, repeatedly jumping to the core of the picture - the cold moment of Chen Li's murder. The smelting blast furnace was transformed into a dazzling steel "furnace cross", with 1600°C liquid metal pouring down like a waterfall, and the hot steel dripping onto the ground with the scarlet word "sin" imprinted on it.
Iron's ultimate torture of blazing humanity is the final showdown between sin and redemption under the flames of the Cross of Steel. Everyone who is exposed to it, whether they are high-ranking factory owners or small programmers struggling to resist, their souls will be burned and recast in this factory purgatory dominated by mechanical will.
