Late at night, the entire apartment building is drawn into a death game. The black cat announced the rules on the radio: "First, don't open the door to strangers; second, don't trust your neighbors; third, and most important - please confirm that your roommate is still a human being." When everyone thought that they could survive by hiding at home, Lin Yuan found that his roommates were chatting crazily against the empty wall, and the "don't open the door" rule turned out to be the biggest trap in this game.
