She was nothing but a plain loser in the eyes of her students. She was involved to a darkest tragedy two years ago. Eurus wanted to be free, she seems lonely and trapped with the past and by the words of her father. She was destined to marry another man for her father's company and for the sake of their name. Eurus knew she wasn't ready to get married, she never wanted to get married to someone-whom she doesn't know. But of course she can't, she could stand her father's word. She can't contradict his decisions. And as she grow old, she wasn't free. Even she have top the board exam and be a licensed teacher, her father won't let her go. At first being a teacher was good and fun, not until one tragic incident ruined her. Everything falls apart. Her father despise her for being reckless. She even went on headlines but with the power and connection of her father her name was cleared. Eurus was ashamed of what she did in the past. So she promised to herself never ever get involved with anyone. But things change, her perception in life change when her eyes laid on him. When Gillian Park came. A boy who doesn't care about the world, a boy who have dreams but a pure of disappointment in his mom's eyes. They have the same passion in music and their hearts beat with the same rhythm. And yet, they know it was forbidden. She was a teacher and he was student. She was getting married and he was destined to be a successor not to be musician. Their lives crushed, and one of them needs to leave. And one of them is the greatest downfall of the other.