Shirley, the long‑lost true heiress, was swapped at birth. After eighteen‑year‑long survival in underground fighting rings, she is taken back by the DuPont family. Faced with a biased mother, a vicious foolish younger brother, a scheming fake heiress, and Alan, her seemingly gentle uncle who murdered his elder brother to seize power, she pretends to be weak and outmaneuvers her enemies. From reclaiming her identity to infiltrating the group, she finally takes down Alan with her business strategies and the brooch recording, claiming the supreme power of the DuPont Consortium.