Ali hosts an extravagant holiday Ice Ball.
With Christmas approaching Aria, Emily, Hanna and Spencer look to clear Spencer's name. Alison gets a glimpse at the past, present and future by a ghostly presence.
The PLLs team up with Mona to find more info about Bethany.
With Alison leading them down a dangerous path and "A" barring them from telling the police the truth, Aria, Emily, Hanna and Spencer feel trapped and are desperate to find a way out of this mess. But could the girls lose everything by putting their faith in a possibly untrustworthy ally? Meanwhile, Alison begins to build up her own army now that the PLLs have turned their back on her.
As the PLLs prepare for the Thanksgiving holiday, they team up with Mona to find more info about Bethany.
Feeling trapped by Alison and "A," Aria, Emily, Hanna and Spencer take a leap of faith and turn to an unlikely person for help. Meanwhile, Alison begins to build up her own army.
Melissa reveals her experience from the night Ali died.
Melissa (recurring guest star Torrey DeVitto) finally tells Spencer what she knows regarding the night Ali disappeared. But what is Spencer supposed to do with the knowledge? Knowing something is off about Alison's story, Emily is on the hunt for answers of her own. She enlists Ezra's help in finding out more about Cyrus and his past connection to Alison. Meanwhile, Hanna asks Spencer and Toby (recurring guest star Keegan Allen) for help with Caleb's drinking problem.
Melissa's secrets are finally revealed and Hanna demands the truth about Ravenswood from Caleb. Plus, Emily is on the hunt for answers of her own and enlists Ezra's help.
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