who is mastermind about

Nancy, a small-town girl, decides to marry Steven, a homeless man she rescued by chance. She does this to avoid being forced by her foster mother to marry the town bully. Nancy doesn't realize that Steven is the president of the Williams Group and is actually engaged to the heiress of the Thompson Foundation, who went missing years ago—and who is, in fact, Nancy herself. But then Lily stole her identity. How can Nancy get back what she's owed?

She was once the respected Miss Schneider, but through a fateful marriage she ruined her family and lost her beloved. After her release from prison, she has only one goal: to defeat her ex-husband and the hypocritical rival, to uncover the truth about the events of two years ago and to clear her father's name.