Marat/Sade was released in the year 1967。Marat/Sade is also called as Verfolgung und Ermordung Jean-P, The Persecution and Assassination of Jean-Paul Marat as Performed by the Inmates of the Asylum at Charenton Under the Direction of the Marquis de Sade, Mordet på Marat, Jean-Paul Marat'n vaino ja murha Charentonin sairaalan näyttelijäryhmän esittämänä ja herra de Saden ohjaamana。
The Marquis de Sade is locked in the Charenton mental hospital and decides to put on a play. His overseers agree as long as he follows certain conditions. He writes and directs the other mental patients in a play based on the life of the Jean-Paul Marat. As the play progresses, the inmates become more and more possessed by the violence of the play and become extremely difficult to control. Finally, all chaos breaks loose.