Bi Ji picked up a bag of drugs in a bar. The police showed up at the right time and Ji was accused of drug trafficking and was sentenced to prison. Long Di returned to Hong Kong from abroad and learned that Bi Ji was in trouble. Long Di hurried to the prison to visit Bi Ji. Seeing that Ji looked different, she figured out that Ji was haunted by a female ghost. In order to resolve the disaster, Long Di had to pick one of Ren, Ba and Jiu to go to prison to save Bi Ji. Bi Ji was bullied by the boss in the prison and was pestered by the female ghost to find her husband. She was miserable. On the other hand, Jiu was chosen to go to prison, but Jiu did all kinds of bad things but was not arrested. On the contrary, Ren accidentally injured a traffic policeman and was arrested and became a prisoner. The female ghost went around to intimidate the prisoners to find her husband for her, and even the director was frightened. After Bi Ren introduced him, the director asked Long Di to exorcise the ghost. Long Di forced the ghost to show up, only to find out that the ghost's husband Wu Mingtian was wrongly accused of drug trafficking and sentenced. Wu Mingtian felt that his future was ruined and he was unable to take care of his wife Meihao, so he committed suicide in prison. Meihao committed suicide to show her loyalty to her husband and turned into a ghost to look for her husband in prison, but unfortunately she could not find him. The director told Wu Mingtian that he was buried in the back hill of the prison before his sentence was completed, so the ghost went to the back hill to look for her husband. Long Di thought that Bi Ji was accused of drug trafficking and might have been wrongly imprisoned, so she asked Ba Ge and Jiu Ge to inquire about the news. At this time, the ghost could not find Wu Mingtian in the back hill, and was furious and wanted to take revenge on the person who fooled her...