A young Vietnamese woman living in Paris travels back to Saigon for her estranged mother's funeral. Her brother had recently built a new house in Saigon, including what was rumored to be the first elevator in a private home in the country, but days after moving in, their mother mysteriously fell down the elevator shaft, dying in an instant.

After the funeral, the daughter becomes increasingly fascinated with her family's history and learns of an enigmatic figure, Paul Polotsky, from her mother's notebook. Like an amateur sleuth, she trails Polotsky through the streets of Paris. Meanwhile, she tries to find clues about her mother's past, which zigzags through Hà N?i, Sài Gòn, Paris, Pyongyang, and Seoul. Combining elements of the detective thriller, a historical romance, and the immigrant experience, Elevator in Sài Gòn is a scathing satire of life in a communist state and a heartbreaking postcolonial ghost story.