Following an encounter with Bloody Rose, the quest for the genuine Rose Waters commences.
The identities of the Pretty Little Liars are leaked online and the girls rush to find out who is behind the anonymous calls as they keep Mouse's surprise party under wraps; the night of the party is near and Tabby uncovers a disturbing secret.
Trying to distract herself from disturbing hallucinations, Imogen and the girls try to forge a new image to distance themselves from the massacre.
Six months after the Milwood Massacre, the girls try to enjoy their summer, while also desperately waiting a verdict in A's trial. However, due to their failing grades, they are forced to attend a horror much worse than death: summer school, if they want to advance to their junior year.
