Relates the life and times of Irène Joliot-Curie, the eldest daughter of Marie and Pierre Curie, and her husband, Frédéric, and their contribution to nuclear physics.

This documentary relates the life and times of Irène Joliot-Curie, the eldest daughter of Marie and Pierre Curie, and her husband, Frédéric, who made a contribution to nuclear physics that marked the beginning of a new era in the relationship of man towards matter. The Joliot-Curies discovered that it was possible to artificially create new atoms and new sources of radioactive radiation. The film makes use of the Curie family photos and home movies, as well as interviews, stock footage and dramatizations. Julianne Moore narrates.