Framed for a crime she didn't commit, young French traveler Martine is cruelly imprisoned in an Italian women's prison. Subjected to mental and physical torture from both the cold-hearted nuns who run the place and the hardened female prisoners around her, Martine struggles to maintain her sanity. Just when things look like they can't get any worse, a riot engulfs the prison and it soon becomes every inmate for herself! Martine must make a decision: join in on the orgy of destruction or resign to a life of imprisonment. Will she ever regain her freedom?