An exploration of light for artists, using a wide variety paintings to show how the behavior of light defines and nuances of form, color, space, and atmosphere; and discussing different mediums and their results.

Painters such as Monet, Renoir, Pissarro, and Degas created a scandal at the painting salons 135 years ago because they dared to paint color, form, and light differently. This documentary offers insight into the artistic world's mistrust of the Impressionists and chronicles the movement's 30-year struggle for legitimacy.