Worried that Ali is being tortured by Uber A, the liars turn to a potential enemy for help.
In this latest installment, the liars search for their beloved comrade Hanna Marin. Spencer, Aria and Emily discover the remains of a very important figure from Emily's past. Concurrently, Hanna is shown the light to her escape by an unexpected person. Meanwhile Toby, Caleb and Ezra uncover the dark past of a former cop who is supposedly gone.
The liars worry that Ali is being tortured by Über A and turn to a potential enemy for help; Tension rises between Aria, Ezra and Liam as they work on the book together; Emily receives a disturbing phone call and tries to find a way to see Ali.