In a bustling city, with its bustling lights and feasting, there are always some "things" appearing at night. Such as the vampire zombie incident that once shocked the country, and the cat-faced old lady...
I once saw a headless woman in a deserted alley, holding her head with bright red nails.
Under the street lights beside the bridge on a rainy night, a woman in white sang, but no one in the crowd heard her.