Tyrant girl in disguise

"From now on your a boy not a girl"

her mother said as Ian was born. For her father to not give his company to her older brother Ian's mother disguised her as a girl but it was not easy. Her brother and father continuously tried to get rid of her but she made connections with powerful families successers and finally she was announced as the heir to walker family but her brother plotted and she was kidnapped. Her mother and sister were dragged away while she was now powerless and then she met the underworld lord what will happen to her ? Will she able to reclaim her right of being an heir again? Can she find her family members?