2006 film by Lionel Bailliu

When Chloe, a young Parisian, decides to take a long-overdue vacation, she has to find someone to look after Gris-Gris, her beloved cat. Everyone, including her gay male roommate, refuses to help her, but she finally makes an arrangement with the elderly Madame Renée, who often watches over other peoples' cats and dogs. However, when Chloe comes back, Madame Renée tells her that unfortunately the cat has been lost, and the unlucky owner goes on a search for her dear animal friend. While looking for the cat, she meets many colorful characters who populate the neighborhood.

French philosopher Denis Diderot produces the first encyclopedia while indulging in 18th-century decadence.

How, thanks to what's known as the "Butterfly theory" (a random series of unlinked events), can a young woman and a young man meet?