A daughter who was raised as an enemy by her parents spent her whole life paying off her "blood debt", only to discover that they hated the wrong person.
The heroine has been locked in the basement since she was a child, made to kneel and break the glass, slapped in public, slandered for stealing, and deprived of inheritance rights. Everyone knows that her parents hate her, and everyone can bully her. She endured it for eighteen years, just waiting for the truth - how her mother died.