With the shocking news about Ian making the rounds through Rosewood, the liars and their families all try to cope with the outcome; Hanna gets a surprising look into Caleb's life after his shady foster mother surfaces.
On the eve of the Rosewood Charity Fashion Show, the liars are surprised with Jessica DiLaurentis' return to town and her request that they participate in the show on Alison's behalf; Spencer quickly learns that Mona has stepped in and taken charge of running the event.
Aria tries to process Spencer and Emily's news about Jason while dealing with her feelings for him; Hanna tries to be nice to her future stepsister Kate; 'A' turns up the heat on Emily by trying to push her to breaking point.
All is not what it seems as "A" sends the girls on a hunt to destroy lives. Can the liars go through with their given tasks in order to save one, or will they ignore "A" to save those around them from being hurt?
It's the Halloween before Alison went missing and the friends hope to score an invite to Noel's Halloween party; Jenna challenges Ali for Queen Bee dominance; Aria learns a shocking revelation about Byron.
A month has passed since the liars were arrested and they're at each others' throats and Emily has been iced out completely. But what could have divided them so severely, has "A" finally won the game of divide and conquer?
Toby continues to pursue Spencer, knowing that she is keeping something from him; Hanna begs the other girls to stop using Caleb to help with their search; Aria is desperate to save her relationship with Ezra.
Aria continues to question Holden on what exactly he is up to during their "date nights"; Hanna tries to figure out the latest situation with Kate; Emily gets help from an unlikely source to get back on the Rosewood swim team.
With fathers looking to make amends and daughters trying to keep the peace, Rosewood's annual Father-Daughter Dance looks to be anything but fun; Ashley continues her hunt to find answers about what is going on with Hanna with help from a surprising source.
The liars are on the quest for answers of what Alison knew before she died; Jason drops off a bag of Alison's personal items that could be more than just a bag of junk; Toby's return to Rosewood brings a surprise reunion that ends dangerously.