Louis is struck down with fever and, whilst the official version is that he has had a hunting accident, the courtiers are suspicious and Philippe lets slip to Rohan that, if his brother dies, he will be regent. When the delirious Louis runs round the palace in his night shirt the facts become visible and the queen, Cassel and others meet secretly to plan ahead should he not survive but Louis recovers, thanks to Claudine Masson, daughter of the late court doctor whom Louis now appoints as his physician. Due to Fabien's spy network he also exposes the conspirators, in particular the CHevalier, and orders arrests to be made whilst finally releasing Mademoiselle de Clermont to become a nun on her request.