But in the morning, the servants found Serefin’s violin in the middle of the Rotunda, playing a single chord on its own. And on the floor, in fresh wax drippings from the melted cylinders, someone—or something—had written:

The echo began to loop. Klara’s “Melk” became a plea, then a scream, then a whisper again. The Baron realized with horror: she hadn’t vanished. She had spoken the name of the place as a warning. The echo wasn’t a memory—it was a door . And every time he listened, he held it open.

The Baron de Melk was never seen again. But travelers on the Danube at midnight sometimes hear two voices calling from the cliffs: one asking for help, the other patiently learning to sound human. And if you whisper “Melk” into the right cave, the answer comes back just a little too quickly.