A PENDANT That United The Souls

This is a BTS fanfiction where a PENDANT is as important as Y/N's Life. Why is she controlling her emotions and how important is that pendant to her. What is the secret of that pendant that Y/N can do anything for. Why is she not interacting with people? But when she tried to open up herself, how did she experience it? What steps did she take when she faced Kim Taehyung?
This is Suspence, Tragedy, Romance, Action Story.
STORY IS FULLY BASED ON Y/N. THAT'S WHY KIM TAEHYUNG'S ENTRY IN THIS STORY IS LITTLE BIT LATE. SO READ THIS STORY IF YOU HAVE A PATIENCE.