In the shocking summer finale, an intriguing riddle from A has the Liars hitting the road and heading to Ravenswood, where they are surrounded by some familiar faces. During a very special magic show, one Liar pulls a disappearing act, leaving the other three scrambling to make sure she hasn't succumbed to the tricks of A. But before they can hightail it out of Ravenswood, they make a shocking discovery that proves everything they thought they knew about A and the A team might be wrong. With this discovery, the Liars may just have started World War A. Meanwhile, a joyous reunion between Hanna and her mother is cut short when A sets sights on a new target. And Toby (recurring guest star Keegan Allen) uncovers some surprising information about Wren (recurring guest star Julian Morris).