Weird Stories About Rules: Former Ace Investigator Returns

Ten years ago, the top rules investigator "Wu Ying" disappeared after the last ghost story "Silent Night". The files were wiped out, leaving only legends in the world. Ten years later, he became Qin Chuan, a delivery boy. He just wanted to run orders, pay off debts, and live a peaceful life. Until late one night, he received a takeaway order delivered to the "19th floor" - an office building with only 18 floors. The order notes read: "If you can see this message, it means you are also awake. We are waiting for you on the 19th floor."