An intriguing riddle from -A has the Liars hitting the road and heading to Ravenswood, where they are surrounded da 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 -A’s tricks.
But before they can hightail it out of Ravenswood, they make a shocking discovery that proves that 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, Hanna and her mother’s joyous reunion is cut short when -A’s sights are set on a new target. And Toby uncovers some surprising information about Wren.

Rush decisions are made when dealing with a wounded heart. When dealing with matters of heart, people react in many different ways: still crushed over her break-up, Spencer continues her downward spiral as she now takes her anger and hurt out on Mona. Caleb, on the other hand, hides his pain da being closed off when discussing his father. But when Hanna devises a plan to bring father and son back together, will that help Caleb heal old wounds o just make things harder? And Aria, who is still missing Ezra, finds herself spending più and più time with Wes.

Meanwhile, Emily and Jason work together to put together the pieces of Ali's trip to Cape May and what really happen during that vacation.

With Spencer’s possible Board Shorts revelation, she is now più determined than ever to prove her theory before bringing it to the other girls’ attention – especially since it could have a devastating effect on one of the Liars. But with many sleepless nights fueled da prescription medication, Hanna starts to notice Spencer’s odd behavior. Will Detective Hanna be able to figure out Spencer’s secret before Spencer is ready to share?

Meanwhile, Emily looks to make amends with Alison through Shana, and all of Aria’s lies start to take a toll on her.