On the seventh day of consecutive overtime work, Su Xiaolong heard his colleagues talking in the company toilet cubicle:
"He's so pathetic, he doesn't know that this building doesn't even have an 18th floor."
Su Xiaolong felt a chill all over—his work station was on the 18th floor.
The next day, he found that the elevator button jumped from 17 to 19.
What's even more terrifying is that every overtime night there are footsteps behind me.
But there was no one, until the thing whispered in his ear:
"You have always been on the 18th floor..."
