The Mysterious Letter

Exploration Stage: Red Rose Café
From: Detective
Description: A girl was found dead in a deserted drugstore. Horrible sight. While Cardsharp was getting me, the sealed letter in the girl’s hand disappeared. It may be the main clue! Martha’s found out where it is now. Could you help me find this letter?
Completed: Here it is, the mysterious letter. “I remember being carried by hooded people. I woke up in a deserted drugstore feeling terribly weak. I found a sheet of paper and a pencil. I’m writing it in the hope of being saved...” But nobody saved her...