Xu Congan often loses express delivery recently. Who is so shameless? With this question, she noticed for the first time the neighbors she had ignored in the past. A fat man with obscene eyes, a young couple who often scolds children, a demented old lady, a gentle man who seems to be a cat abuser, a female writer who stays behind closed doors all day... Is it because the house she rented is on the unlucky fourth floor that she meets so many strange neighbors? When she saves enough money, she must move out from here.
Later, the thief who stole the express delivery was found, but a body appeared on the fourth floor...
Intention: When the false is true, the true is also false; when the true is false, the false is also true.
