The movie is about a psychologist, Tuong Minh who provides psychotherapy to An Nhien, a young female writer suffering from anxiety disorder. Nhien states that she's obsessed by a certain girl. Strangely, the girl she mentioned is the main character in her first novel, The Whispering. Through the treatment and study of her novel, Tuong Minh gradually realizes that what Nhien wrote in her book is not fictitious, but her real sorrowful memories. With his professional methods, Minh tries to help Nhien face her unpleasant story in the past. He hopes she could overcome her obsess and commence a new life. However, during the treatment, Minh steadily immerses himself in Nhien's story and her obsess.