Article 7

Deliveryman Shen Zui mistakenly entered an old apartment that did not exist in the map or household registration system. The residents here have abided by seven iron rules for generations - no opening the door after 23:00, no answering the door, no counting of stairs at night... Anyone who disobeys will disappear mysteriously. Shen Zui soon discovered that he was the only one who could use logic to deduce the truth behind the rules: each rule corresponded to an old case that had been erased. When he put the seven pieces together to form a complete picture, he realized that the building itself was a sophisticated hunt for "insiders". And he must find the person who wrote Article 7 before he is also erased.