In Rosewood, Pennsylvania, reporters are lined up outside the historic courthouse, typing furiously at their iPhones with freshly manicured nails. Because the trial of the century is happening right here in Rosewood: the four pretty little liars have been accused of killing Alison DiLaurentis. Only Aria, Spencer, Hanna, and Emily know that they have been framed. Ali is still out there, laughing as she watches the girls go down for her murder. But when your nickname includes the word 'liar' no one believes you're telling the truth.... Aria tries to run away from it all but finds that life on the lam is ever harder than life as a liar. Spencer gets in touch with someone who can help her disappear - but when a guy from her past reemerges, Spencer no longer knows what she wants. Hanna decides that she'll hear wedding bells chime before she serves time. And in the face of prison, Emily does something truly drastic - something that will change her friends' lives forever. As the trial goes on and the outcome looks grim, the girls are in their darkest hour yet. But maybe they can finaly figure out how to beat Ali at her own game. Because once upon a time, she was just a pretty little liar too.