Troublesome Night 17

Bud Gay is arrested for drug trafficking and sent to prison. When his mother, Mrs Bud Lung, visits him, she senses that a ghost is haunting him so she sends Bud Yan to help him. They learn that the spirit is a vengeful ghost of a woman, who had followed suit after her husband committed suicide when he was wrongfully imprisoned. All she wants is to see her husband's grave, which is located behind the prison. When the burial site cannot be found, she thinks she has been fooled so she unleashes her fury on everyone.