A French take on Agatha Christie's detective novels. Instead of the legendary detectives Hercule Poirot and Captain Arthur Hastings, new characters investigate intricate and mysterious crimes. In the first season, Commissioner Larosière and his assistant, Inspector Émile Lampion, take on the search for criminals. In subsequent seasons, Commissioner Laurence and journalist Alice join forces. Together, these heroes embark on dangerous adventures, take risks, employ deduction, and inevitably uncover the trail of the culprit.