Incest between mother and son in Datong: Daughter-in-law returns to her mother's house, son can't resist having sex with his mother at home.

This film focuses on a taboo story of an ordinary family in the Datong region. During the daughter-in-law's visit to her parental home, the son stays alone at home and cannot suppress his intense desire for his mother, ultimately engaging in an intimate relationship with her in the marital bedroom. Through delicate psychological portrayal and realistic scene recreation, the film explores the breakdown of family ethics, the causes of incestuous impulses, and the moral conflicts and emotional entanglements triggered thereby, revealing the hidden desires deep within human nature.