Despite patching up her relationship with her mom, “A” was still causing a TON of problems in Aria’s life. In the summer finale, all the girls were invited to Mona’s birthday party. They weren’t sure they wanted to go – until they got this message from “A”. 

So all of the Pretty Little Liars gathered at the party determined to find out who “A” was. Unfortunately, before Aria could find out exactly who had been tormenting them, Hanna got hit by a car! Get a full play-by-play of the summer finale right here.