Armed with the knowledge that Alison is alive, Aria, Emily, Hanna and Spencer have more questions now than ever before. Trying to put the pieces together Hanna comes up with the idea that if they find out who is really buried in Ali's grave it may lead to much needed answers. But as the girls search, Emily has trouble dealing with how she feels about Alison being alive.
Never trust a pretty girl with an ugly secret. Gossip thrives amid the Mercedes-Benz, mega mansions, and perfectly manicured hedges in the exclusive town of Rosewood, Pennsylvania. Everyone has something to hide. Based off the book series of the same name, the series follows four estranged best friends Spencer, Hanna, Aria, and Emily who are reunited after their best friend and queen bee of the group, Alison, goes missing only to discover they are receiving messages from an anonymous "A" who knows all their secrets.