The Man Who Knew a Lot(2014)

Original title: L'homme qui en connaissait un rayon

Mr. Beranger works at Paradesign, a furniture department store where the employees live day and night in the decorations. Himself lives in a show cottage in pasteboard and excels in the promotion of his dachshund footrest. His life seems settled well, until the day when he is promoted to the mysterious thirteenth floor of the store.