Questions about the new mystery surface as the liars stay in Rosewood; A restless Aria starts to look suspicious; Emily continues to lie about her life in California.
Hanna admits the truth; Aria and Emily look for answers about Ezra; Spencer and Caleb try to track down the new threat; New love interests emerge and old ones resurface.
Convinced that Sara Harvey is behind the new threats, the liars work together to get answers; Caleb and Hanna make a plan to fight back against the new stalker.
The liars investigate a new suspect; Aria tells Ezra the truth about the book; Spencer and Caleb deal with a media leak; Emilly is harassed by the stalker.
The liars start taking the threats more seriously; Caleb deals with taking the blame for the leak; Emily tries to track down who attacked her; Aria and Ezra move on with the book.
Alison is faced with a sudden jeopardy; Hanna and Caleb develop a plan to come face-to-face with their tormentor; Emily and Spencer investigate Mona; Aria and Ezra continue with the book.
The stalker threatens to kill the liars if they don't divulge Charlotte's killer by the election; Alison experiences strange visions and starts to question her sanity.
The liars rush to save Hanna after she's abducted by Über A, and the only way is to turn over evidence that will reveal who really murdered Charlotte DiLaurentis.
Hanna wonders if she should reveal the truth to the police; Ali learns her friends turned her in to Uber A; Someone is killed for being on the wrong team.
Jason returns and goes all-out in order to get rid of Mary; The liars learn something new about Mary and Jessica; Ezra gets a call about someone in his past.
Emily and Paige apply for the same job; Hanna is visited by Mrs. Grunwald; Ali returns to work; Spencer and Aria pursue answers from the doctor who delivered Mary's baby.
The liars face off with their enemies in a chaotic fight that ends fatally; One liar learns a secret about her past; Another discovers something about her future.