Jean-Pierre Granval

New Europe presidential candidate Etienne Alexis is a scientist promoting artificial insemination for social betterment and therapy to eliminate passion. To celebrate his engagement to a cousin, he hosts an aseptic picnic, where Mother Nature asserts herself. A shepherd's flute conjures a windstorm throwing Alexis together with the luscious Nénette, a farm lass who, although unimpressed with men, wants to have a baby.

Dr. Cordelier, living in a suburb of Paris, withdraws from society to pursue research into the functioning of the human brain. His lifelong friend, Maître Joly, becomes concerned when Cordelier draws up a will that bequeaths his entire estate to a stranger, Monsieur Opale; he cannot understand why Cordelier defends him, considering Opale attacks women and children. After a colleague is killed, Joly confronts Cordelier and discovers the truth behind his friend's behavior.

Police Commissioner Jules Maigret returns to the small village where he spent his childhood at the request of the Countess of Saint-Fiacre, who has received a disturbing anonymous letter.