A documentary film about occupational diseases shot in 1957 at the Francolor factory in Oissel. It takes the form of a scientific investigation to discover the origin of a mysterious illness that has infected a worker at the factory.
Director: Alain Resnais, André Heinrich
Producer: Jacqueline Jacoupy
Director of Photography: Sacha Vierny, Ghislain Cloquet
Writer: Chris Marker