In The Mad Sister 3, the enthralling Roxy Ann Diamond returns to complete her mission! This time, the stunning menace sets off on a journey from the fictional town of Parish, California, to Jordan. She escapes from the shadowy depths of her mad creator's laboratory to the heart of a worldwide conflict, where she faces the esteemed members of the fictional Parish Police Department, the infamous foes accountable for her creator's downfall. Engineered to seek vengeance for the loss of a sister who was a medical and scientific genius, the rookie officers stand no chance as the fearless Roxy Diamond obliterates the entire department, only to discover the startling truth that she was created devoid of emotions.