Paige throws Emily a surprise birthday party with even more surprising guests - Jenna and Shana. But it's "A's" actions at the party that lead to the biggest shock of all. Mona's selfless act provides Hanna and her mother with their first bit of good news, but sends Mona down a familiar path. And Ezra gets some distressing news from Maggie regarding her and Malcolm. Meanwhile, Aria and Jake continue trying to define their confusing relationship. And Emily meets with a world class coach in a last ditch effort to salvage her swimming career.
Hanna comes up with a desperate plan to save her mother from a conviction and turns to the only person she thinks can help - Mona. Caleb tries to convince her Mona can't be trusted, causing Mona to prove her loyalty in the most unexpected way. And Spencer returns to an old haunt to investigate new evidence relating to Wilden and his surprising ties to another mysterious death. Meanwhile, "A's" recent machinations take their toll on Emily and her mom, driving Emily to reconnect with her old boss Zoe to look for an escape. And Aria relies on Jake to help her understand Mike's new attitude, leaving them both confused about the nature of their relationship.
Caleb and Toby team up to investigate "A" and what really happened the night of the lodge fire and encounter a source that points to a new possible identity for "Red Coat." Hanna struggles to act like everything is normal and her friends are unsure about how to help her. Aria worries about Mike's behavior in light of an incident at school and Ezra struggles with how he now fits into her life. Meanwhile, The Liars are determined to find a new suspect in Wilden's murder and their tactics have unintended consequences. And, "A's" new plan threatens to send everything crashing down around one of the Liars.
Hanna has some explaining to do to her parents and the police after she's found with something she shouldn't have. Mona spills a secret of Spencer's to the other Liars - leading to hurt feelings amongst the group. Emily tries to help Hanna, only to have "A" turn the tables. And Aria helps out a friend of Mike's, who gets the wrong impression of her. Meanwhile, Shana keeps popping up in the most unusual places. And Spencer's investigation into who was on the other end of Ali's mysterious phone number leads her and Toby to Ravenswood - which is unlike any place they've ever seen.
Spencer and Emily make plans to visit a nearby college, but they have very different agendas for their time spent on campus. Spencer's singular focus in figuring out Ali's apparent connection to the school contradicts Emily's real fears about her plans for after she graduates. And after a stinging attack by "A," Aria and her brother Mike don't see eye to eye regarding what's best for their parents. Meanwhile, Hanna becomes increasingly frantic when she makes another horrifying discovery among her mom's things, leading her to make a desperate move - with disastrous results.
A new police detective investigates the Liars' possible connection to Wilden's death; Emily's parents are scrutinized; Toby receives more information regarding his mother's death; Spencer sets a trap for Melissa.
The Liars wonder why Melissa is back in town.
The latest move by ``A'' has a powerful effect on Emily.
The Liars are desperate to uncover what new scheme ``A'' has in store for them in the wake of the lodge fire.
ABC Family's summer of mystery kicks off with a bang when original series "Pretty Little Liars" and "Twisted" premiere with more twists, turns and drama in all-new episodes, starting Tuesday, June 11th. "Pretty Little Liars: A LiArs Guide to Rosewood" recap special, encompassing all three previous seasons of "Pretty Little Liars," will premiere on Tuesday, June 4th (8:00 - 9:00 PM ET/PT). Featuring new voice over from the all-seeing Mona, this special will recap the Liars' history with "A" from the very first text message to the most recent spotting of Red Coat. In the Season 4 premiere of "Pretty Little Liars," entitled "A is for A-l-i-v-e," airing Tuesday, June 11th (8:00 - 9:00 PM ET/PT), the Liars are desperate to uncover what new scheme "A" has in store for them in the wake of the lodge fire, and have no choice but to turn to Mona for answers, now that she is also being targeted. Aria struggles with seeing Ezra in the wake of their breakup, and Emily starts to make plans for life after high school. Meanwhile, "A" sets Toby on a new path, what's in the trunk is revealed, and a shocking discovery reverberates through Rosewood.
Despite Spencer's brave face, Aria, Hanna and Emily remain concerned about their friend's health; shocking revelations are revealed.
Ezra's new family situation eats away at Aria; Jamie is haunted by his shady past; Spencer seeks answers regarding Mona's stay in Radley Sanitarium.
Aria, Emily and Hanna search for Spencer, unsure if she went off on her own or if "A" is behind her disappearance, and their concern grows when they discover Spencer's family has no idea where she is. Meanwhile, Emily meets Olympian Missy Franklin.
Hanna helps Ashley in the wake of her mom's hit-and-run and ponders if "A" was involved in the incident. Meanwhile, Emily is not receptive to Spencer's warnings; and Aria must accept Ezra's new role as a father.
The girls look into Det. Wilden's background, but he finds out and tries to stop them. Meanwhile, Spencer seeks support from a friend.
The girls are divided about going to Ali's memorial service. Elsewhere, Emily deals with unresolved feelings about Nate's death.
The Liars take desperate actions.
Meredith takes care of an ill Aria, but Hanna and Emily are suspicious of Meredith's motives. Elsewhere, Spencer arranges a surprise for Toby on their anniversary.
Aria, Emily and Spencer think Mona has regressed to her old bad behavior, but they have no proof, and Hanna has doubts about their claim. Meanwhile, Aria's suspicions about her dad intensify when something important vanishes from her room.
Mona is released from the sanitarium and returns to school, but she faces an uphill battle in which she must prove to Hanna, Aria, Emily and Spencer that she has transformed and can be trusted.
Maya's murder trial gets underway, and Emily can't withstand the media attention surrounding it. "A" then extends an olive branch to the girls, who are skeptical about the sincerity of this offer; and someone close to the girls betrays them.
Spencer uncovers Paige's violent past with Alison and warns Emily about her, but Emily is reluctant to take her advice. Meanwhile, Aria attempts to help Ezra put his past behind him, but this proves to be more difficult than she anticipated.
Hanna and Emily seek clues about Maya at the Kahns' cabin in the woods. Meanwhile, Spencer investigates Noel; and Aria tries to process the details she's learned about Ezra's background.
Spencer and Aria attend the Kahn brothers' party and engage in an intense game about truthfulness with Jenna. Elsewhere, Hanna receives another text regarding Caleb from "A."
Emily seeks answers about the night she was drugged, and she tries to reconcile with Paige. Meanwhile, Aria meets Ezra's mom and gains insight into his past; Hanna attempts to help Mona; and Spencer asks Caleb to hack into a Web site for her.
A conversation with a detective leads Hanna to think she's being framed by "A," so Aria seeks assistance from Mona. Elsewhere, a person from Ali and Jason's past shows up in town unexpectedly.
Hanna attempts to find out who's assisting Garrett. Meanwhile, Spencer seeks Jason's help; Emily has another flashback, which points her toward a suspect; and Aria wonders why Ezra is suddenly rolling in dough.
Aria and Emily search for "A" at Jenna's lavish birthday party. Meanwhile, Spencer keeps an eye on Garrett, who's out of jail visiting his sick mother; and a brokenhearted Hanna uncovers a surprise.
Caleb doesn't understand why Hanna is visiting Mona, and this tempts Hanna to tell him the truth. Meanwhile, Aria considers sharing details about her dad's dating life with her mom; Spencer seeks answers about Melissa; and Emily meets Maya's cousin.
Spencer is curious about why Garrett is her mom's client, so she investigates and uncovers a family secret. Elsewhere, Emily receives unexpected news about her English test; and Aria has an ulterior motive for assisting Jenna.