Who killed Toby's mother? Who hit Alison in the head with the rock the night she went missing? Who is Red Coat? Who killed Bethany? Who is the Black Widow? Why has "A" been targeting the PLLs all this time? After years of torture, Alison, Aria, Emily, Hanna and Spencer finally come face-to-face with their tormentor and learn the story of how and why Charles became "A.".

After years of tormenting and numerous shocking revelations, the Liars finally uncovered the true identity of "A" in the summer finale of season six. Now, five years later, the girls have each pursued their own paths and have started adjusting to a life without "A," when something happens in Rosewood that forces them to go back to where it all started. Torn between their old habits and their new lives, the events in Rosewood compel the Liars to join forces once again, as relationships are put to the test and secrets are revealed. Having matured over the past few years, these are not the same girls who left Rosewood. As new lies emerge - how will they push forward without going back?.