When she came to work in a foreign country, who was the mysterious man she met at her boyfriend's celebration party? He was cold and mysterious, but he actually saved her when her life was at stake. But from that moment on, she felt that she was no longer herself. When she became a bloodthirsty race, she hated him for dragging her into this bloody whirlpool, but she could never get rid of his charming and cold eyes. There are permeable atmosphere and secrets everywhere in the castle. What kind of past does he have? Little did she know that what gradually made her fall into this vortex was actually fate.