Following an accident that occurred around twenty years ago, Christine now suffers from a very rare form of amnesia. Every morning, she wakes believing she is a young, single woman with her whole life ahead of her, only to discover that she is actually 47 years old and has been married for twenty years.
 
Her last hope lies with her new doctor, Ed Nash. He has advised her to keep a journal so that she can remember what happens to her each day and gradually piece together her life. But when she begins to notice strange inconsistencies between her journal, what the people around her tell her, and her few scattered memories, Christine has no idea what she is about to uncover.
 
Very quickly, she will have to question the few things she believes to be certain in order to uncover the truth about her past... and her present.