Shanghai at night is a hothouse of love, cultivating delicate flowers; it is also a crazy meat grinder, crushing the dreams of young girls; who steals a moment of joy in love, and stays in front of the lamp all night, knowing that the hope is slim, but longing for her lover; if love conflicts with sisterhood and is not ethically allowed, how should she choose? If the old man's heart changes, will she forgive him again? The poor long for survival in Shanghai at night, and the rich pursue indulgence in Shanghai at night. They are lost in Shanghai in 1934 and lost in the endless night of desire.