Emily awoke to a sound she couldn't quite place. It was a soft rustling, like someone moving about the room. She opened her eyes and saw nothing but darkness, the moonlight filtering in through the curtains casting an eerie glow.

"John?" she whispered, nudging her husband. But there was no response. She reached out to touch him, but her hand met only empty space.

Emily sat up, her heart pounding in her chest. She fumbled for the lamp on the bedside table, but when she turned it on, she wished she hadn't.

The room was empty. There was no sign of John, no sound of his breathing. And there was something else, too - a chill that seemed to seep into her bones.

Emily threw back the covers and stumbled to her feet. She groped her way across the room, her hand trailing along the wall. But when she reached the door, it wouldn't budge. She rattled the handle, but it wouldn't turn.

Panic set in as Emily realized she was trapped. She pounded on the door, screaming for John, but there was no answer. The rustling sound grew louder, and Emily could feel something breathing on the back of her neck.

Suddenly, the door creaked open. Emily stumbled into the hallway, gasping for breath. But when she turned around, there was nothing there. No John, no intruder - just the empty darkness of the house.