Wanqi Hotel is a retro-style hotel located on the hillside on the outskirts of the city. The exterior walls are covered with dark green vines. The floors are not high, only six floors. There is no elevator and only a narrow and dim spiral staircase. The hotel has been open for decades and has never done any publicity. It only accepts guests who get lost while driving late at night or are inexplicably directed. The door is closed during the day and is only open to the public from 6 pm to 6 am. After dawn, the hotel will completely disappear. If guests fail to leave before 6 am, they will be trapped here forever...