In a silent old city of thirty years, the night watchman's clapper suddenly sounds at the third watch.
Duan Pengfei, a paper effigy maker, carries on the tradition of the night watch.
The clapper sounds without a source, mysterious passersby appear in the blue-stone alleys, and his father inexplicably lights a lamp in the middle of the night.
The old rules of the night watch have long been buried in the dust of the city.
But tonight, the clapper is reminding everyone:
The night that must be kept has come again.
