In 2007, Chicago-based historian and collector John Maloof discovered 100,000 negatives and hundreds of hours of Super 8 film footage and audio recordings which he acquired during a storage locker auction. What he didn't know was he was on the cusp of uncovering some of the most prolific American street photography of the 20th century. Vivian Maier spent next forty years working as a nanny for various families of Chicago's upper crust neighborhoods. She also spent much of her time with a Rolleiflex camera hanging from her neck, shooting people and scenes around the city, a hobby she kept quiet throughout her life. Her subjects ranged from the rich and affluent to the poor and impoverished with a penchant for politics and highlighting historical moments.