Lexi Smart wakes after an accident believing it is 2004 and that she is still an insecure young employee with crooked teeth and a disappointing love life. In reality, three years have passed: she is glamorous, wealthy, married to a handsome man and running her department with frightening efficiency. Unable to remember how she acquired this perfect life - or why friends resent her - Lexi investigates her own recent past and discovers that success may have cost more than she realised.