One morning, Diane discovers that Hermann, the famous publisher who she loves, is going to publish a book by Worms, the famous writer and her ex-boyfriend - and that the book is about her.
Another morning, Hermann meets his ex-girlfriend, Anne, who he'd left for Diane.
Worms, who happens to be nearby, takes a photo of the encounter on the sly with his cellphone and sends it to Diane.
Crisis!
That same evening, Anne turns up unexpectedly at Hermann's place, while Diane visits Antoine, Anne's former doctor, who has now become her husband.