Deadly rendezvous

Exploration Stage: Castle Gate
From: Isabelle
Description: I noticed a Ghost Girl nearby, but she's very afraid and is hiding. Try to gently lure her out. I'm sure I'll be able to talk to her about how the Detective showed up at Jack's Castle in the guise of Dracula.
Completed: Here's what I managed to find out: after visiting Jack's Castle, the Dracula-Detective brought Juliette here. He tended to her, they drank something out of glasses. Then the Detective kissed Juliette, and she, in the words of the Ghost Girl, became white as chalk and fell unconscious, as if she'd died!