The work of a film editor usually takes place in secret. At the end of their work is a finished film - the result of weeks of concentrated work. In documentary films, the narrative structure is often only found at the editing table. The editor is a co-author who juggles with the existing material and organizes it. It's about rhythm, compositional thinking, the sensitive handling of space and time. In the documentary by Gabriele Voss, who also works as an editor herself, renowned editors, a brain researcher and the author and director Alexander Kluge use selected film examples to report on seeing, hearing and perceiving, on chaos and order, on hidden tricks and astonishing techniques.