At the gates of Paris, the Bois de Boulogne is associated with prostitution and a sulphurous nightlife. However, this magnificent stretch of nature in an urban environment is a popular walk for Parisian families. Meet some of its regulars. John, dog trainer, walks a pack of luxury dogs. Cédric leads the mountain bike brigade in Le Bois. He has forged an astonishing relationship with prostitutes, between complicity and repression.