Sima had lost her sense of smell when she was a child. After having a car accident, she suffers a minor brain injury and her sense of smell returns. The return of her smell sense happens with an intense abnormality. Now she could smell things that others cannot. Sima finds out that she is hypersensitive to the particular smell of opium. Taking advantage of her new ability, her husband wants to extort money from drug addicts. He learned it is an easy way to make money, but things spin out of control once they get mixed up with the police.