Spencer is determined to find out what Jason is hiding at his house and decides to finally get some answers. With Jason continuing to pop up in Aria's life, will she be able to resist their undeniable chemistry?

With new key evidence in Alison's murder case, Hanna fears that "A" may be framing her after a visit from Det. Wilden. With paranoia setting in, Aria decides that she has to turn to Mona for answers if she is going to help Hanna. But is Aria ready to face her former tormentor, and more to the point, is Mona ready to give Aria the answers the PLLs are desperately looking for? Meanwhile, someone from Ali and Jason's past arrives in Rosewood and piques the girls' interest.

Emily's relationship with Paige has been anything but easy, but she finally feels like their relationship is going in the right direction. So when Spencer comes to her with a sordid tale about Paige's history with Alison, Emily is not ready to heed her friend's warnings. With Spencer knowing Paige's violent past and this new information about a blood feud between Alison and Paige right before Alison disappeared, she can't stand by to let one of her best friends get close to a potential enemy. But will Spencer cross a line that Emily can't forgive in her attempt to prove to Emily who Paige really is?

Meanwhile, Aria feels she has to help Ezra move on from his past if their relationship is to move forward, but what she finds may be more than she expected.