Who Is Gigi?

Gigi meets a handsome man at a party, a man from her past, a past she thought she had left behind. Her first instinct is to disappear - until she realizes he doesn't recognize her. He is obviously attracted to her, which would have been a dream come true in her past life. But now It would be dangerous if her secret is discovered. Against her better judgment she starts to see him. After all, she is a different person now.
She has transformed herself physically into a pretty blonde, and has shed her excess weight, has even changed her name. How long can Gigi keep her past life a secret? What will happen when Jason discovers her true identity?