The heroine lost her mother when she was young. As a young man, her father owed a fortune and left with the money.
The heroine was forced to go out to work and met a mysterious man by chance. He seemed to know everything and even offered to give the heroine a new identity.
The heroine agreed, and the man paid for her plastic surgery and gave her a new identity as a popular actress in the entertainment industry.
However... This is all a conspiracy.