Mrs. DiLaurentis' presence in Rosewood continues to unnerve all those around her, especially when she gives Hanna a family parrot, whose gift for mimicry provides startling insight into Alison's last days. Tired of feeling defenseless against "A," Aria decides to learn self defense and is intrigued by her sexy instructor. Meanwhile, Toby shares a heartbreaking secret with Spencer, and Hanna makes an alarming discovery regarding her mom. And to complicate matters even further, "A" nearly kills the newest PLL — Mona.