A long summer vacation appears to be just what Aria, Emily, Hanna and Spencer needed to heal from the traumatic year that included Maya's murder and learning Mona was "A'.' Things may seem "normal," but the four girls are hardly over what happened. As school starts and the second anniversary of Alison's death approaches, what begins as an attempt to leave the past behind ends with a shocking new nightmare. With the unearthing of family secrets and shifting alliances among the girls' intimate relationships, sinister new mysteries unfold... mysteries that the girls are desperate to solve in order to clear their names and find out the truth behind Alison's last days-and to stay alive.  The suspense builds and the scares come lightning-fast in all 24 Season Three episodes of this buzzed-about series based on Sara Shepard's best-sellinq books.