Prison of Secrets (1997)

Lynn (Stephanie Zimbalist) is found guilty of a white collar crime. Thinking she's innocent, she turns down a plea bargain to have her day in court. It's a disastrous move: She's sentenced to 10 years and ends up in a hellish prison presided over by the sadistic Sgt. Craig (Dan Lauria). Guards trade sexual favors for drugs and preferential treatment, pimp out prisoners at night as working prostitutes and preside over a reign of terror. Lynn fights tooth and nail to expose their corruption.