Felicity and Annabel were separated at birth. Felicity was sent to her rich father and Annabel remained with her poor mothers guardian. Felicity, being blessed with a well-off family, experienced being the Señorita where she always got what she wanted. Having a loving father and a loyal assistant (Peter), Felicity felt she had it all. On her 20th birthday, she met a waiter, Wesley, and an unanticipated thing happened. Her father died in an air crash that pushed her to be the sudden president of Formosa Company. With the aide of Peter, Felicity somehow lessened her sorrow. Believing that Peter was very loyal to her family, Felicity entrusted him everything, including the financial stability of the company. With him showing concern to her, Felicity fell in love with Peter without knowing his plan of murder. On their date, when he proposed to her, Peter pushed her car off into an abyss. There was an explosion. Believing that Felicity died in that accident, he twisted a story wherein he said that she had left Taiwan for Paris after a quarrel with him.
Months later, Wesley met Annabel, whom he mistook for Felicity. He tried to convince Annabel to forget about the quarrel she had with Peter. Meanwhile, Felicity luckily survived the accident and was aided by a mentally-disturbed plastic surgeon. To her dismay, her face was changed to another identity. With that, everybody found her crazy when she said she was Felicity. When Felicity met Annabel, the two decided to switch places to destroy Peter and bring back Formosa. The decision apparently destroyed their friendship, as Annabel was attracted to Wesley, but discovering that Wesley liked Felicity, Annabel betrayed Felicity. Not long before they realized that they were blood siblings, Annabel chose Peter rather than her own family.
The conflict spread as Felicity was forced to prove her true identity through DNA testing and claimed her part. A Taiwan serial wont be complete without a twisted plot, so it was then that Felicity discovered her terminal illness. Annabel found out about her disease and helped her destroy Peter, not only for Felicity but also to avenge the murder of their father.