Night Inn is based on the Chinese theatrical adaptation of Maxim Gorky's The Lower Depths by playwright Ke Ling. The play and the film were both banned in China during the Cultural Revolution but were popular in the post-Mao period.

Da Xiang, a girl whose father died early, was deceived and sold to a brothel, and her desperate mother chose to commit suicide. Now a prostitute, she faces a tortuous life.

A man who becomes wealthy starts to have an affair and though his wife knows of it, she says nothing. Soon, the affair starts to have consequences and his business falls apart while the man’s sister starts to have a relationship with the brother of his wife.

Chen Shaochang (Shi Hui), a primary school principal widowed at a young age, raises his children alone. His close friend's daughter, Liu Minhua (Zhu Jiachen), whom he hasn't seen for many years, begins working at the primary school through his introduction. Chen Shaochang's son, Jianzhong (Han Fei), and daughter-in-law, Feng Lijun (Li Huanqing), consider Chen's job undignified. After retiring, he is filled with melancholy, understood only by Minhua. Although their relationship deepens, they must contend with the ethical and social norms of Republican-era Shanghai.

A New York City businessman meets a window washer hoping to commit suicide and decides to market his grief to the highest bidder in this acidic satire on American capitalism, one made even more memorable by the fact that the entire “American” cast are Chinese actors in whiteface. The greedy Mr. Butler (Shi Hui) convinces the suicidal “Charley” that he might as well endorse some cigarettes as he jumps out of his office window, and maybe wear a particular suit too. A true cinematic oddity, this Korean War–era propaganda piece is a satire that Frank Tashlin could envy.