Swept Away(1983)

Original title: Bãi Biển Đời Người

Kiều Trinh, a French-Vietnamese journalist, returns to Vietnam with her husband and daughter to visit his relatives in a seaside town. Here, she meets her husband's uncle, an idiosyncratic neurosurgeon. As the days go by, Kiều Trinh discovers the new mysterious in-law is fascinated with her, and has ulterior plans for her family.