In 1985, Claude Lanzmann debuted one of the most monumental cinematic works of all time, Shoah, the nine hour documentary on the Holocaust told through interviews with both perpetrators as well as survivors. Ziva Postec, the editor of Shoah, was an indispensable part of the project. Postec dedicated six years of her life, from 1979 to 1985, working closely with Lanzmann, to construct the right pace and sequence for the 350 hours of footage. In this fascinating documentary, Postec recalls this gargantuan, painful and necessary experience, as well as revealing the the film's profound impact on her personal life.