Gorgeous young French tourist Martine (Martine Brochard) gets arrested while on vacation in Italy. After being found guilty of a trumped-up drug possession charge, Martine finds herself incarcerated at a hellish women's penitentiary where the inmates are subjected to mental and physical torture by the staff and fellow felons alike. Things are compounded in severity when a riot breaks out in the prison, and Martine struggles to maintain her sanity. Soon it becomes every inmate for herself!