Work is based on actual events and the incidents revolve around Ashley Patterson, the daughter of the well known surgeon Steven Peterson. Her co-workers are Toni Prescott, an outgoing singer and dancer, and Alette Peters, a shy artist; they do not get along well.
Ashley's disease turns out to be the result of being molested by her own father during childhood. She gets cured and re-enter the world outside.
You will never forget MPD after reading this, and always will be intrigued by it.
--- Thanks to Roshni who recommended this book to me, who I am sure is reading this.