Plot Synopsis

Everything about the town of Beacon Heights seems perfect, from its top-tier college to its overachieving residents -- but nothing in Beacon Heights is as it appears to be. When the high-stakes environment pushes the residents to a breaking point, someone snaps and kills someone. As they work together to solve the murder mystery, it soon becomes clear that behind every Perfectionist is a secret, a lie -- and a needed alibi. In the wake of Nolan's murder, Ava, Caitlin and Dylan join forces to give themselves a credible alibi on the night in question. Alison goes toe to toe with Dana Booker, BHU's new head of security, who is suspicious of Nolan's "perfect" posse. And Mona starts slipping into old habits while wrestling with a guilty conscience. PRETTY LITTLE LIARS: THE PERFECTIONISTS is based on the novel "The Perfectionists," with characters from the novel "Pretty Little Liars," by Sara Shepard.