When I was sorting out my grandmother's belongings in my old house, I found an old calendar under my pillow. The paper is yellowed, and the year is a strange "Guimao·No Spring Year". Grandma used a red pen to mark every date with dense taboos. Thinking it was just an old man's superstition, I casually took it back to my apartment in the city. Until I woke up the next day, the calendar page turned automatically, and a new line of blood words appeared next to the date: "Today, do not go out. Violators will die." I did not believe in evil and stepped out of the house. The elevator malfunctioned and plummeted from the 28th floor... And I was the only passenger.