A sudden change made Duan Muyuan, the daughter of a wealthy family who was the pearl of her parents' palms, become an orphan daughter who lost her father and brother within a few days. The eyeing clan relatives and murderous family house made her have to disguise herself as a man and live as her deceased brother Duan Muhong. She must rely on her mother's help to investigate the truth about the murder of her father and brother and to smash the family's plot to embezzle the family property. Under her new identity, Duan Muyuan began a series of difficult and dangerous lives. Not only does she have to hide her true gender, but she also has to deal with a variety of complex relationships and sudden challenges. In the process, she gradually discovers some secrets about the family, which are not only related to the death of her father and brother, but may also involve the fate of the entire family. In order to protect her family, uncover the truth and restore her property, Duan Muyuan must bravely face many difficulties. In the process, she befriended a loyal friend and developed a deep affection for him. Together, the two go through many trials and eventually work together to uncover a series of amazing secrets that bring hope and a bright future to the family.