At the bookstore, Ella tells Aria about Zack's invitation to Vienna. Aria asks if she is considering it and Ella tells her she did consider it, but only for a second. Aria asks if she is worried about being away from Zack for a year, and Ella says yes, it is a long time to be away from someone.
Hanna worries that her mother is keeping a dangerous secret and is determined to protect her at all costs, which leads to an uncomfortable meeting with Detective Holbrook. A clue in Ali's things leads the Liars to a creepy mask maker, who takes a shine to Emily and may have ties to another Rosewood resident. Spencer and Toby continue their search into a painful chapter of Toby's past and Melissa returns to Rosewood. Meanwhile, after "A" targets Emily's mom, Pam, Aria makes a desperate plea of her mom, Ella. #PLL #PrettyLittleLiars