Aria volunteers at Radley to look for clues. Emily's mom hosts a dinner.
After the big endiing of the 100th episode, the PLLs deal with the fallout.
With the town of Rosewood trying to get back to normal, the PLLs - especially Ali - are far from okay after the latest "accident." Alison is especially spooked and thinking that it wasn't the right decision to come home after all, she starts to consider leaving for good. But Aria, Emily, Hanna and Spencer are determined to keep her safe in Rosewood and to figure out who and what is behind this latest incident. Meanwhile, Caleb also starts second-guessing his return, and Ezra dives into his research to help find answers.
Alison is spooked after the most recent Rosewood "accident" and wonders if she should have come back after all. Caleb also starts second-guessing his return.
In the 100th episode, Ali returns to school, Caleb returns to Rosewood.
The day has finally arrived: It's Alison's first day back at Rosewood High and neither the Liars nor Alison are really ready for it. Determined to put on a brave face, Alison also hopes to help heal the damage she did years ago. But are apologies enough for those who Alison has hurt in the past? Not if Mona and her army have anything to say about it. Meanwhile, Caleb and an old foe return to Rosewood.
Ready or not, it's Alison's first day back at Rosewood High and Mona and her army are ready. Meanwhile, Caleb and an old foe return to Rosewood. This is the series' 100th episode.
The PLLs continue their investigation into who killed Mrs. D.
With Alison now back in Rosewood, she attempts to regain the role of leader of the group, but she finds her four friends are not as willing to blindly follow her every whim as they once were. Besides feeling the pressure from Ali, Aria, Emily, Hanna and Spencer are also feeling under the microscope at school as the high school focuses their attention on the Liars. While most kids are morbidly curious about what happened to Ali, some are more focused on planning for Ali's return to school. Meanwhile, Aria's depression continues to spiral, and she looks for comfort from an unlikely source.
The girls continue to feel the pressure at school and from Ali, as she attempts to regain the role of group leader, and Mona makes plans for Ali's return to Rosewood High.
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