Plot

Ben sees a new patient who is terrified by the legend of a man who slaughters those who repeat a specific mantra into a mirror.

Ben is now living elsewhere but still meets patients in the house as they can't afford anything else. It doesn't sit well with Vivien who would like him to just go away. Ben's latest patient is someone who thinks he can conjure up an urban legend, a killer with the head of a pig. Vivien has an amnio and traces the technician who did her first ultra sound. She scoffs at what she hears. Moira tells Vivien what she thinks about her marriage and Vivien asks her to leave. Violet meanwhile learns of a massacre at her high school in 1994 and Tate's role in it. She also learns about Tate's mother.—garykmcd

The doorbell of a familiar door rings and Constance (Jessica Lange) answers. A SWAT team bursts in, looking for Tate.

It's 1994 and a normal day at Westfield High. Some students and the librarian (Tom Gallop) mill around in their quiet solitude of bookshelves. Suddenly, somewhere outside the library, several pops are heard. A student bursts through the doors and proceeds to barricade them. He tells those inside that somebody is shooting up the school, shooting people. They barricade the main doors. The shooter enters a forgotten rear door, shooting the librarian trying to hold it shut. Whistling a hauntingly-familiar tune, he begins picking them off, one by one. The shooter is revealed to be Tate (Evan Peters).

Back at the house, the SWAT team has their guns trained on Tate in his bedroom. He stands and mocks them with a simulated gunshot to his head - his nod to the movie Taxi Driver.

In the present, Violet (Taissa Farmiga) searches for the Westfield High massacre on her computer. She recognizes the victims in the pictures - they visited her on Halloween night. She then sees an article of their killer, her love interest, Tate. Horrified, she dashes downstairs to find Constance smoking in the kitchen. Constance, aware that Violet knows about Tate, tells her that she believes the house drove him to do it.

Constance takes Violet to her house to introduce her to Billie Dean (Sarah Paulson), a medium. Billie tells Violet about how she herself was "chosen," and how some confused spirits linger on the earth after their deaths. Constance explains that she wanted Ben to treat Tate, to get him to accept his condition. Constance wants Violet to help Tate move on.

Violet prepares to bail out, thinking it was a setup. Then, to convince Violet that shes for real, Billie asks about "Mary." We see a flashback of a dying elderly woman (Linda Porter) telling Violet: "They don't understand you." Billie is aware of this and asks Violet if that phrase means anything to her. That creeps out Violet, leaving the two ladies to wonder if they can trust the girl.

Vivien (Connie Britton) sits, looking very pregnant, applying lotion to her belly. The baby inside her, starts clawing at her. Vivien awakes from the nightmare, shaking. Either out of fear or needing adult conversation, she summons Luke (Morris Chestnut), her security guard. Ben (Dylan McDermott) appears, as well. She finds him "disgusting and disappointing as a man" and wants him gone. However, he is the income-producer and has to continue his patients' sessions in the house. Vivien relents.

Violet, still shaken by the revelation about Tate, cuts her wrist with a razor blade again then imagines cutting her throat, before she's interrupted by Tate. "Are you scared now?" he asks her. Then, as quickly as he shows up, he's gone.

Ben meets with his new patient, Derek (Eric Stonestreet), an insomniac who's paralyzed with terror over urban legends. Recently, hes been afflicted by the Piggy Man, supposedly a hog butcher in Chicago during the 1903 Worlds Fair. The Piggy Man, who disappeared mysteriously, allegedly wore a mask made from one of his kills. Derek tells Ben that, if you stand in front of a mirror and say "Here Piggy Pig Pig," he'll return for the slaughter. Has the patient tried it? No, but something inside of him is afraid that he might just do it. Before they see each other again, Ben says, Derek is going to have to try to shave in a mirror. After the patient leaves, Violet comes in seeking comfort from Ben. "The darkness," she says, "it has me."

Vivien, meanwhile, tries to contact the nurse who passed out during her ultrasound. She quit, the hospital tells her.

Constance saunters in, voicing her concern for the pregnant Vivien and offering nutrient-rich pig offal to help the new mother cope with her morning sickness. She asks Moira (Frances Conroy) to saute the piggy parts for Vivien, the way she used to do so for Constance. We need that baby, Constance tells Vivien. We need another sweet child around here.

Moira, frying up the offal, offers some wisdom for Vivien: Mr. Harmon will cheat again. Then, as Vivien is digesting Moira's morsels of truth, the maid serves her the offal with a little sea salt and lemon. She saved the pancreas, though. Its better eaten raw, Moira assures her.

Ben and Derek meet again, as Ben pushes him to confront a mirror and his fears of the Piggy Man. Ben shuts him in the bathroom and turns out the light. Skittishly, Derek starts chanting "Here Piggy Pig Pig" before he hears something rustling in the shower. He pulls back the curtain to find a glaring Gladys (Celia Finkelstein), one of the house's previous victims.

Vivien visits a doctor to get an amniocentesis. Ben shows up, even though hes not quite welcome in Vivien's eyes. But he affirms that he's the daddy! Later, in the kitchen, Vivien tells Moira that they're going to have to let her go. Moira insists on staying, saying shell work for free. Why, she even has a fresh meal ready for her and the baby. A raw brain from an organic farm. Vivien digs in, and she cant seem to get enough of it, wolfing it down.

Violet, meanwhile, apologizes to Leah (Shelby Young), the girl she led to be attacked in the houses basement. "The devil is real," the girl says before telling her a story from the Book of Revelation about a red dragon that eats babies. Leah also happens to have some pills to help Violet sleep.

At the Westfield High library, Violet encounters the wheelchair-bound librarian who was wounded in the shooting. She begins to ask him about Tate, but he doesn't really want to talk. "Good people just don't have a bad day and start shooting people," Violet says. "Maybe he wasn't a good person," the teacher replies.

Violet comes home to catch someone out of the corner of her eye. Thinking it's Tate, she follows the entity down to the basement, where she's accosted by some of the house's spirits, except who she's looking for. She dashes upstairs to her room, where her iPod was left on and a message on the chalkboard is waiting for her: "I love you." She's had enough, so she helps herself to the pills Leah gave her.

Tate drags Violet down the hall, crying for her not to die. He pulls her into the shower in a bid to wake her up, gagging her into vomiting the pills. He's saved her life, but that doesn't look like what she wanted.

Ben meets Derek once again, but the perpetually terrified sap is making little or no progress. For some reason, we then see a flash of Ben spying on Vivien and Luke having another weirdly deep conversation.

Vivien finally tracks down the ultrasound nurse. Praying in a church, the nurse (Heather Olt) doesn't want Vivien to get too close to her. "I saw the unclean thing you carry in your womb. The plague of nations. The Beast," the former nurse says. "Okay, so you didn't see anything. The machine malfunctioned," Vivien replies. The former nurse is insistent. "You need some help," Vivien says before she leaves, while the nurse spouts certain Bible quotes at her.

Derek's home now, deciding to give the mirror chant a try again. Just as he confronts his fear of the Piggy Man, chanting the magic words three times, the shower curtain flies open. It's not the Piggy Man, just an easily offended burglar (Peter Allen Vogt) who shoots poor Derek in the forehead. The burglar and his partner (David Ury) take off.

Back at Constance's, Billie tells her that her dead daughter is angry with her. "She was my reason for living," Constance says, speaking of Adelaide. "Talk to her," Billie says, "she's here." Constance begins apologizing for the way she treated Addy, telling her that she actually admired her and thought her the most beautiful girl she ever met. "She says thank you, and that she knows," Billie tells Constance. Addy also tells her, through the medium, that she is a pretty girl where she is, and that she's glad Constance didn't get her on the lawn of the murder house before she died. Addy's afraid of Tate, especially now that she knows about him.

Flashback to the day of the shooting. Constance is crying for the cops not to hurt her son. We again see Tate mock the police before he reaches for a gun under his covers. They open fire. "Why did you do it?" the commanding officer (Preston James Hillier) asks him. Tate's eyes glaze over before he can answer.

We see Violet lounging in her bed, flipping through a book about birds. Tate appears, and they share a moment of understanding. He tells her she's become distant and cold, and that he would leave her alone if that's what she wants. "I love you," he tells her. Violet, moved by this, comforts him. They spoon, trapped together in a twisted tale of teenage ethereal love.