Coustaud and Milka have to organize a memorable party to bury the boy life of their friend Tom. They go into their usual cafe, where all the guests that night give their opinion of the marriage, its setbacks and its amenities.

Laurence Renoux, chef du service des maladies tropicales et infectieuses dans un hôpital parisien, est inquiète. Depuis quelques jours, elle est confrontée à une épidémie de source inconnue dont les symptômes s'apparentent à une méningite fulgurante, et qu'elle ne parvient pas à endiguer.

Back in Brittany, Captain Morgane Ledantec is confronted with the discovery of human bones after the fall of a sacred oak during a storm. The victim was a follower of druidism which Morgane was introduced to as a teenager by her godmother.

Gaëtan (age 70) pees in dots and dashes. Max (age 50) can no longer get hard. Félix (age 20) shoots too soon. 3 men, 3 generations, 1 thing in common: manhood malfunctions.