Hanna's insecurities and current situation continue to plague her when Alison moves into the Marin house while her Dad is out of town. Now forced to live with the one person she is trying to avoid, Hanna retreats further into abusing alcohol and ends up in a sticky situation. Meanwhile, Aria drops the ball on her maid of honor duties when Ella returns to town to plan her wedding and Spencer and Emily pursue a dangerous lead, trying to solve the mystery of the dead girl in Alison's grave.
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.