Just because of a play by the fairy boy, she was separated from her original life and came to another world. The two people who had nothing in common met and got to know each other, and eventually fell in love and stayed together. However, she had her concerns and didn't want to get closer. He also has his obsession, but he refuses to let go. Such love was too difficult to maintain, so she finally decided to leave and find a corner to wander alone. But what awaits her is his cold confinement. When love turns into paranoia, the two of them can only torture each other. His ruthlessness and determination left her struggling. When everything comes to light, the red line of fate is back on track...