To catch the new burglar Robie stakes out an estate at night and finds himself struggling with an attacker who loses his footing and tumbles over a cliff. It is Foussard, who dies in the fall. The police chief publicly announces that Foussard was the jewel thief, but, as Robie points out to him in the presence of the abashed Hughson, this would have been impossible: Foussard had a prosthetic leg and could not possibly climb on rooftops.
Foussard’s funeral is marred by Danielle's open accusation with Robie's quiet attendance that he is responsible for her father's death. Outside the graveyard, Frances apologizes to Robie and confesses for him her love. Robie wants to continue his search, for the Cat, and asks that she arrange his attendance at the masquerade ball the coming weekend during which he believes will strike again.