Misanthropic novelist François is renowned for crafting captivating crime thrillers—often described as “Agatha Christie meets The Scarlet Pimpernel”—set in the adventurous world of his Marquis la Rose series. However, beyond the daring escapades of his fictional characters, François’s own life is rather dull. His partner, Colette, a distinguished professor at the Sorbonne and a leading authority on Alfred Hitchcock, grows weary of François lounging around their apartment in his pajamas, longing for the excitement and glamour depicted in the classic films she teaches her students. When Colette begins to suspect their charismatic neighbor, a well-known actor, of murdering his wife, their monotonous routine is suddenly shaken up. This suspicion not only disrupts their quiet lives but also rekindles the passion and vitality in their once-stale relationship.