Misanthropic novelist François writes gripping crime stories – “Agatha Christie meets The Scarlet Pimpernel” – but outside of the swashbuckling imaginary world of his Marquis la Rose-novels, life is far from thrilling. His partner Colette, a professor at the Sorbonne and world-renowned expert on Alfred Hitchcock, is tired of watching François sit around their apartment in his pyjamas and yearns for the excitement of the classic films she watches with her students. When Colette begins to suspect their flamboyant actor neighbour of murdering his wife, the couples mundane lives are turned upside down – and their stale relationship is jolted back to life.