Hanna's attempt to protect her mother gets her into hot water with the police. Hanna has some explaining to do to her parents and the police after she's found with something she shouldn't have. Mona spills a secret of Spencer's to the other Liars... leading to hurt feelings amongst the group. Emily tries to help Hanna, only to have "A" turn the tables. And Aria helps out a friend of her brother's, who gets the wrong impression of her. Shana keeps popping up in the most unusual places, and Spencer's investigation into who was on the other end of Ali's mysterious phone number leads her and Toby to the town of Ravenswood -- which is unlike any place they've ever seen.