Plot

The liars go glamping for Mona's birthday as A's threats escalate and the FBI arrives in Rosewood. But not even a mani-pedi can lift the girls' spirits when the evening takes a dangerous turn.

In the hallway, the girls see Ian is back in town. Spencer doesn't want to tell Melissa.

Mona prances up with invitations to "the most awesome birthday ever" - Camp Mona. They're going "glamping" - glam camping.

Spencer and Aria struggle to come up with an excuse not to go.

All at once they get simultaneous texts: "Camp Mona is a scavenger hunt and I'm the prize. Come and find me bitches. -A"

At home, Ashley tries to get through to someone on the phone but fails. Hanna hits redial and hears it's a mortgage company.

Mona breezes in, with Ashley out of earshot she tells Hanna she wants to cut school for her birthday. When Hanna resists, she tells her: "If you disappoint me, I'm going rogue."

Ashley overhears Hanna start to tell Mona things have been tight since her dad left, and interrupts, giving Hanna her last $100 bill.

At their home, Byron asks Aria about her lunch with her mom the next day. He wants to tag along.

Melissa asks Spencer why she didn't tell her Ian was back - he asked her out to coffee. He broke her heart, she said no. She's still getting over Wren.

Flash back to Ian teaching Spencer how to play a lawn sport and it turning into a make out session. Allison sees it and tells Spencer she's a "skank."

Aria makes plans for Sunday with her boyfriend. Ezra sees her kiss him and she feels compelled to make excuses for him. But he says she's allowed to be with whoever she wants.

Aria joins the girls in the hall, they're all atwitter. They heard the cops found something of Aria's. The girls are all paged to the principal's office. Hanna texts Mona that she's stuck at school and gets back a "screw you!"

The cops come in to talk to them. Except they're not cops, they're FBI.

The agents explain they were asked by local authorities to help with Allison's murder. An anonymous source left a tape. She plays it for them. It's Allison in the clothes she was wearing when she was murdered, and someone else's sweater, flirting with someone behind the camera. They tell her about Allison's "older boy."

The mortgage company tells Ashley her extension request is denied. Mrs. Potter comes in for her appointment and fishes around in her purse for her key. She paws through wads of cash to get at it.

Aria tells her boyfriend what the FBI was asking about. She opens her locker and a book falls out with a note from "A" directing her to a poem by Ezra Fitz.

As Mrs. Potter is leaving she scoops up all the butterscotch on Ashley's desk and leaves her key behind. Ashley doesn't say anything.

At school, a heavier girl asks Hanna for the name of her liposuction doctor. Mona clues her in, "A" sent her a text saying Hanna had liposuction. Mona informs her she's no longer invited to her party.

But later Hanna tells Spencer she's still going.

Aria reads the poem "B 26" by Ezra. It brings her to tears. She goes to see him. She asks him how he could have ended things if he felt that way about her.

She tells him she's moved on and he should. Her boyfriend walks up and hears. But she says nothing is going on.

Melissa mopes at home as someone comes up to the window. It's Ian. Spencer and all the girls come in. Melissa walks off and Spencer tells her to give Ian a chance. She gives in.

Spencer tells the girls about her "moment" with Wren. And she confesses she also had a moment with Ian, then they started dating after he and Melissa broke up.

They see a report on the news saying a warrant has been issued for Toby's arrest. Aria doesn't believe he was Allison's boyfriend since she made such a show of hating him.

Emily hangs out with Maya. She gets a call, but it's just heavy breathing. They hear a noise downstairs. It's Emily's dad, returned. Pam tells Maya they're ready for family time.

Aria tells her mom how Allison was apparently pretending to hate Toby. Ella tells Aria she wishes she'd told her about her dad. Aria promises no more secrets.

Emily's dad checks on her. He tells her Toby is dangerous. He tells her Toby owes Allison's family the truth, saying it's always better to be honest than tell a lie. Emily's about to tell him something, but doesn't. In the hallway, Pam looks at pictures of Emily and Maya from the photo booth.

Melissa comes back from coffee with Ian, saying she had a good time. She tells Spencer she's tired of them hating each other. Melissa mentions the news and Spencer says Allison had a lot of secrets.

Emily pulls up for glamping. Suddenly, Toby appears in her backseat. "I want to finish what I started to tell you at homecoming," he says.

In the woods, Toby tells Emily that September 1 was the day he ended things with Jenna. She threatened to tell people he forced himself on her if he broke up with her. Jenna was in love with him, and still is, he says.

Mona welcomes people to her party and hands out swag bags. There are massage tents, mani-pedis and the works.

Toby tells Emily that he asked Allison to meet him to help with Jenna and he saw her and lent her his sweater because she was cold. He saw her getting into a car with an older guy. He swears he's innocent. He knows it looks bad and he plans to run. He tells Emily he's not leaving til midnight, if she can get away.

Emily tells Aria and Spencer about Toby. They want to call the police. Hanna calls and Aria tells her about Toby but they get cut off. Aria gets a text. "You found my bracelet, now find me, bitches."

Mona summons Emily and Aria to have their hair blown out so Spencer heads off to where they found Allison's bracelet. Aria gets a text from Ezra saying he has to see her.

Hanna sneaks up to the edges of the party, on the lookout for "A."

Spencer comes back with Jenna's keychain and a note: "You're as in the dark as Jenna, looking for me in all the wrong places."

They wonder where they should be looking.

Ashley drives through town, clearly tense about something. Byron knocks on her window, asking for a lift home. She says she's not going home. She drives off, and we now see she has wads of cash in her purse.

Toby waits at the church for his ride. Police cars pull up instead.

Back at Mona's party, Spencer figures out the note. They're supposed to go to Wright's Playground.

Hanna waits in the woods. A car pulls up.

Spencer and Emily go to the playground. A swing is swinging but no one's there.

Hanna tries to see who's getting in the car through her binoculars, but can't.

We see it's Ezra, waiting for Aria. He tells her he was a coward and should have fought for her. He was looking for another job so they'd have a chance. He thought she deserved a chance at an uncomplicated relationship. She tells him he doesn't get to decide that. He asks her to forgive him. She says no. Then she kisses him.

Hanna sees the car's headlights go out and can apparently see inside: "Oh my god."

Emily and Spencer find a tree with names carved in it: "Allison +...." They remove the moss to see "Ian."

Hanna watches as someone sneaks up on Ezra's car and writes "I see you" in the steamed up back window. She sends a text to Emily and Spencer: "SOS. I know who 'A' is. Heading to the parking lot."

It's completely dark and spooky as Hanna goes to the parking lot. The other girls appear on the other side of the lot. Hanna sees A running in the distance. She runs toward the girls in the parking lot, but they scream when they see a car coming right at her.

It runs her down.

She rolls up on the hood and then lies in the dirt as they call for help. She's not breathing. They get a text: "She knew too much. -A"

Cut to someone's house, with the tape of Allison flirting with the camera playing on a laptop. We see the end of the tape, her taking the camera and turning it around on the person filming: it's Ian.