Margaret and her kids are sleeping when some workers wake Margaret by unloading barrels outside her window. She sees Ward Boss Neary taking a sip of beer. She gets up to bake something.
Nucky is lamenting the arrival of St. Patrick's Day. He hates "the yearly display of crying, arguing and public drunkenness that goes along with it," he tells Elias. Eli feels slighted when the server at the Ritz asks Nucky is he wants breakfast, but doesn't ask Eli anything. Eli thinks it means something, but Nucky disagrees. Eli tells Nucky he's planning on making a speech at the upcoming Celtic dinner. He's been taking public speaking lessons. Nucky is against it, but relents.
Margaret arrives and offers Nucky some soda bread. He tells her to leave it with the bellhop, then blows her off by telling her he's late for a meeting. After Margaret leaves, Eli mentions she's "not a bad looking woman."
"My life's complicated enough," Nucky says, before leaving. Margaret watches him walk away and she throws the soda bread in the trash.
Some midget boxers are getting ready for their fight, but they're upset that they're expected to wear leprechaun outfits for St. Patrick's Day. Their leader asks if they'll be happy with a raise to $10 per person. Suddenly, they're happy.
Jimmy squeezes fresh orange juice for Pearl, whose face is still significantly bandaged. A loud noise startles her, but Jimmy assures her it's just a door closing. He says he won't let anyone hurt her. He pours some laudanum into her orange juice after she'd already finished a small bottle.
Nucky and some of his guys are rejoicing in how much people love liquor, and how much money they're making by providing it. Nucky tells them about Eli's speech, using a joke about him being Daniel Webster for a second time, which annoys Eli. They taunt him a bit, then one of the men sings a song to Nucky about how much money is coming his way on St. Patty's Day.
Margaret arrives at a Women's Temperance League meeting that is far less attended than the one Nucky spoke at previously. A woman stands and reads a story of a woman in Nebraska who fell on hard times and mixed liquor so she could sell it in town. One of her children found it and drank herself to death. The women started sharing stories about the liquor activity in Atlantic City and their leader, Mrs. McGarry, says it's clear the city's leaders have no interest in curbing it, "and with our numbers dwindling, we have to work even harder to get their attention."
Margaret speaks up about the barrels of beer she saw that morning being loaded into a garage by her home. She wonders if Nucky could help, referring to him as "a friend." The women take an interest, and Mrs. McGarry asks her to arrange a meeting. Margaret says she'll try.
Arnold Rothstein reads a story in paper about the 1919 World Series scandal, which is just beginning to unfold. The story names a "well-known New York gambler," and it brings him no relief that he's not mention by name. His lawyer tries to assure him it's all speculation. Rothstein had a dinner with boxer Abe Attell and a "very public dinner" with Sleepy Bill Burns. His lawyer suggests it's not a crime to each dinner. Rothstein admits the dinner was innocent, "but for dessert, he pitched me on fixing the World Series by bribing the players on the White Sox."
"A scheme which you threw cold water on immediately," his lawyer says, prompting a silent response from Rothstein. "Isn't that correct, Mr. Rothstein?"
"It certainly is," Rothstein finally says, without seeming totally convinced. His lawyer tells him not to do anything about the article.
Carl Heely, the leader of the midget group, comes to meet with Nucky. He tells Nucky the boys want a raise for working the Celtic dinner. When Heely says the guys aren't getting enough money for "that kind of humiliation," Nucky replies, "Dancing a jig in a leprechaun outfit? That's what you call humiliating?"
"What do you call it?" Carl says.
"Show business," Nucky shoots back.
Carl says they want $10 a man. He says the party attendees get rowdy and think it's funny to mess with the midgets. Nucky tries to say it'll be better because "with Prohibition, there'll be no booze." Carl's not buying it. Nucky offers Carl a deal: Carl can tell his guys the best he could do was get them $7 each, but he'll give Carl $12 extra for it. Carl takes the money.
Mrs. McGarry and Margaret show up, thanking Nucky for taking the time to meet with them. Margaret asks Nucky if he enjoyed the soda bread and he says, "Yes." Margaret tells Nucky about the beer delivery she witnessed and says that a man who looked familiar, but she couldn't quite place, appeared to be supervising it. Nucky feigns outrage, then tells Margaret his birthday dinner must have bothered her, explaining to Mrs. McGarry that "there was quite a celebratory atmosphere; some champagne and whiskey may have even been drunk." Mrs. McGarry says she's sure his class of acquaintance only drinks in moderation, to which Nucky replies, "If they drink at all!"
He tells them to give the beer-filled garage information to Eli and they'll shut it down. Mrs. McGarry is pleased. Margaret says she appreciates it, and Nucky assures her, "This isn't a personal favor." Margaret says she realizes that.
Pearl refuses to eat. Johnny Torrio pays a visit and pulls Jimmy out of the room. Torrio tells Jimmy, "She gotta go." If she's not making money, he says, then he isn't. Jimmy asks if he can cover it.
"$100 a day?" Torrio asks.
"She makes that much?" Jimmy replies.
"She did," Torrio says. He says she's got until Friday.
The next morning, Margaret hears another beer delivery. She walks out to ask questions. One of the workers tells her they've got to tint the beer green by St. Patty's Day. He calls the boss over. Neary comes over and Margaret asks if Nucky hadn't yet spoken with him. He explains the beer is for the Celtic dinner. He tells the men to be quieter, then offers her a growler, "compliments of the city." Margaret leaves.
We next see Margaret getting dressed in the fancy green negligee and a purple outfit, then waiting in the lobby of the Ritz. She hears a festive atmosphere in Nucky's office while she waits. Eddie comes out and tells everyone waiting that Nucky has "some urgent business" and won't be able to meet with anyone. Margaret goes home and rips the green negligee to pieces.
Van Alden is reading off a list to Agent Sebso of addresses and associating them with counts of cases and bottles of liquor. Margaret drops in and tells Van Alden she has information. He tells Agent Sebso to get Margaret a chair and go outside and block the entrance. She tells Van Alden about the garage full of beer barrels. She estimates 93 barrels are inside. She gives him the address. She tells him "children can see it." She asks him to shut it down immediately. He shows her the map of places where alcohol is being warehouse, distilled or sold, telling her there are now 117.
"They operate with impunity and I do not possess the resources to shut even 10 percent of them," he says.
He tells her the real problem is the place where the alcohol is coming into the city, off the shore, and the growing contingent of people who water it down and resell it, "for whom murder is a means of doing business." He says some of the victims are "just unlucky," adding that "one was a baker's apprentice."
Margaret asks if he means to be cruel. He says he just means to be honest. She asks about the law that creates the criminal, and he says that's the law she just asked him to enforce, "for the safety of your children -- unless I misread your intentions."
"I've been lectured to a great deal today by men who speak boldly and do nothing," Margaret says before getting up to leave. Van Alden doesn't let her leave until she tells him who else lectured her. She says Mr. Neary, and says he owns the garage. She says "he works for Mr. Thompson."
Al and Jimmy talk and Al says they should hit the Irish guys who shot up the place. Suddenly, the place goes silent as Pearl comes into the room in lingerie, with the massive cut across her entire face. She's clearly inebriated and asks who wants to buy her a drink, telling Jimmy she's got to earn her keep. Al tells him to get her out of there. The people in the room laugh as she leaves. She asks Jimmy, "Who's gonna love me now?"
Angela gets ready to go out with a friend as Gillian stays to watch Tommy. Gillian warns Angela of the "lower element" that would be out the night before St. Patrick's Day. Gillian tells Angela she could "be free," and notes that Jimmy might not come back. She offers to raise Tommy while Angela goes off and has her "youthful adventures." Angela is offended by the suggestion.
The Celtic dinner begins with the singing of "Carrickfergus" and Nucky's dad shouts at Nucky, asking where Eli is. Eli finally walks in, saying the boys were using his sash to play Tarzan. Nucky is introduced to get the proceedings underway. Eli asks him when he'll get to talk. Nucky then immediately introduces Eli, who gets taunted by the crowd as he stumbles to get going. He gets the crowd going by taking on the British, blaming them for the Irish famine and saying "the murdering Brits are at it again, naming off a list of Irish heroes who have been killed." He names on incorrectly and someone pipes up, "What's he know? He was born in the States."
That sets off a bit of an argument between some members of the crowd who've come from Ireland and others who were born in the U.S. It devolves into a battle over who raised money for the fight back home (apparently, the U.S.-born Irish) and who actually did the fighting (the ones who were there). Eli tries to keep talking but he's drowned out by the shouting. Nucky looks bothered and the Commodore leans over and tells him he's going to have a riot on his hands. Nucky ends it all by standing up and stopping Eli's speech, telling a few Irish jokes and introducing some bagpipe players, "the little people" (the leprechaun-dressed midgets) who come with pots of gold. The men are upset that there is no green beer. Eli looks upset by the developments.
Pearl wants more laudanum and says they should go to Chinatown where they can smoke it, but Jimmy tells her to take it easy. She wants to hear a story about him -- "something happy." He tells her about the Fourth of July when he was 7 years old and she nearly falls asleep. The story was about a boat trip with a man named Mr. Lancaster, who Jimmy's mom wanted to marry. When Jimmy was done with the story about what he said was a good day, Pearl said, "Tell me he married her."
"Sure he did," Jimmy replied. "Happily ever after."
They kiss a bit and Jimmy gets up to wash his suit after having spilled orange juice on it. Pearl tells him her name is Tally.
"Nice to meet you, Tally," he says.
As he washes his suit, he hears a gunshot. He goes into the bedroom to find Pearl on the floor. Other girls scream.
Nucky is giving Eli a lesson about how "there's a time and place" and that he has to know his audience. Eli is drunk and doesn't much care anymore to take his advice about being a good politician. He tells Nucky, "The whole thing's a game, isn't it? So easy for you."
Eli says that maybe one day he'll be able to lie "as good" as Nucky. "It's lie as well as me, you dolt," Nucky says, telling him to learn to speak properly if he wants to be taken seriously.
Van Alden and some men storm into the dinner. A man stands up and says it's a private party and "the mere consumption of alcohol is not illegal." Van Alden punches the man in the face, then asks if anyone else wants to interfere "with the court-appointed duties of a federal agent." Eli prepares to stand, but Nucky tells him to stay put. Van Alden tells his men to shoot anyone who tries to make a run for it. He says he has an arrest warrant for James Neary. He arrests Neary and tells everyone else to leave.
There's quite a scene outside, with reporters and photographers asking questions and snapping pictures while Neary is walked out. The Women's Temperance League is organized and singing "Stand Up for Prohibition." Margaret is among them, and Nucky notices. Van Alden has the hall locked after everyone is out.
Eli turns and mocks Nucky, sarcastically telling him it was a "great night for the Irish." Nucky tells Eli to go home to his wife.
"I will," Eli says. "Where are you going?"
Nucky says nothing and Eli slowly and drunkenly takes a swing at Nucky, which he easily dodges, asking, "What the f--- was that for?" Another man pulls Eli away and they leave. Nucky stands alone on the steps of the hall as everyone leaves.
In a montage: Jimmy hands money to an Asian women and is escorted inside a building; Angela walks on the boardwalk alone, but goes into Dittrich photo studio where someone was clearly waiting for her; Eli pukes in his bathroom with his wife at his side; Jimmy smokes out of a large pipe; Gillian looks at her reflection and touches her face; Van Alden watches his men hatchet barrels of green beer; Jimmy continues smoking, looking dazed; Margaret's kids sleep peacefully but she lies awake.
There's a loud knock at Margaret's door. It's Nucky. He lets himself in. He tells her he has neither the time nor the interest in games, calling her Margaret, rather than Mrs. Schroeder. Then they kiss quite passionately.