Watch VoirFilms. The new documentary made from the Slánský trial film and audio archives found by chance in 2018 in a warehouse in the suburb of Prague served as a starting point for the film. The director tells the trial through the descendants of three of the condemned: the daughter and grandson of Rudolf Slánský, the son and granddaughter of Rudolf Margolius, both executed after the trial, and the three children of Artur London, sentenced to life imprisonment.