After working overtime until three in the morning, Jiang Jianlu heard someone calling her name in the corridor of her unit. She remembered Rule 7 posted at the end of the corridor - **No Turning Back**. But the moment she turned around, the face behind her was not that of her colleagues, but her own. The other girl in the mirror was grinning: "You violated the rules, now it's my turn." Then a message popped up in the company group: ** [Internal Announcement] Employee No. 0015 Jiang Jianlu has entered the countdown to erasure due to violation of Rule 7. Survival time: 23:59:59**. But Jiang Jianlu took out a crumpled piece of paper from his pocket - it was secretly pushed to her by an old man in a hospital gown when she joined the company four years ago. There was only one line written on it: "When you look back, people who can see the faces of monsters can also see their weaknesses." That night, Jiang Jianlu saw something that should not exist on the security room surveillance - and his fingers typed out one by one on the keyboard: **Indiscriminate killing mode, start. ** I will change all the rules starting today.