The letter arrived at Sarah's doorstep on a crisp autumn morning. It was a simple white envelope with no return address, only her name written in elegant cursive. Curiosity piqued, she tore open the envelope and unfolded the letter inside. The words were brief and cryptic: Meet me at the corner of the street. That was all it said, no signature, no clue as to who had sent it.

Sarah's mind raced with possibilities. Was it a secret admirer? A long-lost friend? Or perhaps something more sinister? She couldn't shake the feeling of unease that settled in the pit of her stomach. But curiosity got the better of her, and she decided to follow the instructions in the letter.

The corner of the street where she was supposed to meet the mysterious sender was a quiet, nondescript place. The buildings were old and crumbling, the streets...