Three months have passed, and Mona's friends and family are still mourning their loss and more adamant than ever that Alison had something to do with Mona's death. Ready to put "A's" game to an end and get justice for Mona, the PLLs ramp up their search for evidence that could prove Alison killed Mona. But with Alison claiming her innocence and having a seemingly airtight alibi, the Liars may have to resort to more shady tactics to put Ali away. Meanwhile, Emily and Paige reach a crossroad in their relationship, and Aria starts to worry about her future.