Dream Within a Dream.

Aspiring filmmaker Yoo Dan is about to leave for Paris to study film. Before her departure, she dreams that her constantly complaining mother has died. Guilt weighs heavily on her, and she confides in her friends about leaving her mother behind. But whenever she faces her mother, all she feels is frustration. Then, one day, her mother's backbone vanishes. Left crawling on the floor, Dan must find it—before it's too late.