As the third season begins, a summer has passed since Aria, Emily, Hanna and Spencer found out about Mona being ''A'' and the death of Maya. With the terror seemingly over and an alleged murderer now behind bars, the town of Rosewood is slowly healing from old and new wounds. Now back together and coming upon the second anniversary of Alison's disappearance, the girls find themselves back on the defensive when a shocking event rocks Rosewood.