Yulia was relieved to be back in her hotel room, away from the sweltering heat of the Lisbon afternoon. She slipped off her dress and let out a deep breath, feeling the cool air on her skin.
As she glanced up, she noticed that the picture above her bed was askew. Without hesitation, she climbed onto the bed to fix it.
As she straightened the frame, she heard a soft tapping at the door. She paused for a moment, wondering who it could be.
Intrigued by the mysterious knocking, Yulia sprang to her feet and ran to the door. She flung it open, ready to confront whoever was on the other side.
But as she stepped out into the hallway, she was greeted by silence. The corridor was empty, with no si...