Mackenzie Hastings has been at boarding school half way across the world for the last 3 years. As she returns to Rosewood after everything has seemingly calmed down she's in for a very big surprise when she finds herself a part of A's games and she can't remember a thing from the night in question. Based on the ABC family show 'Pretty Little Liars'. All rights go to Sara Shepard and I. Marlene King.