The Paris Opera House’s chief groom tells directors Richard and Moncharmin that César, one of the Opera’s twelve horses, has been stolen. He accuses members of his staff of incompetence, but, when he mentions that he saw the Phantom ride the horse in an underground tunnel, the directors assume that Lachenal is insane. However, Lachenal’s connections to important members of society keep him from being fired like Mme Giry. His assertions about the Phantom’s kidnapping of César later prove correct, when Erik uses the horse to take Christine to the lake.