Nucky faces a lot of insurrection among some of his most trusted people. Chalky's own life is threatened when the Ku Klux Klan launch an attack too close to home. Margaret must deal with her son's disciplinary behavior. Angela asks Gillian's advice over Jimmy's affections at home.

When realizing that he might be losing control over Atlantic City, Nucky tries to figure out which one of his men betrayed him. When agents search the Treasurer's Office for evidence, Margaret tries to dig into her past to help Nucky in the present. In New York, Rothstein puts Jimmy on hold, but Meyer Lansky and Lucky Luciano still look to be business partners.

The Commodore uses his contacts in the Coast Guard to stop alcohol from reaching Atlantic City. With his transportation hurting, Nucky reaches out to Washington's new Attorney General, Harry Daugherty, to ask for a favor. To try and prove he's worth something, Owen stops a delivery that was headed for Lolly Steinman.

During Mayor Bader's birthday party, Nucky's attorney comes up with a solution that might help Nucky in his election-rigging case. With a liquor surplus likely, Jimmy and Mickey travel to Philadelphia to search for buyers while Nucky makes a surprising deal to try and get alcohol into Atlantic City. Eli is concerned over the Commodore's ability to lead.

After a dispute with his enemies, Nucky brings in a surprise guest speaker at a Memorial Day dedication for war veterans. Running out of options, Eli questions his allegiances, but it ends up sending him deeper into the hole. Nucky hires a new lawyer.

Nucky tries to set up a risky liquor delivery to Philadelphia. Later, Attorney General Daugherty sees a problem that might complicate Nucky's case. Jimmy finds a new mentor in Leander Whitlock who is the Commodore's lawyer. Margaret finally goes to confessional.

Margaret has a family reunion; Owen gets even with a rival; Van Alden recognizes the hierarchy of the law; Jimmy wonders how a decision will affect the future.

Nucky turns to Arnold Rothstein for political advice in the aftermath of a personal loss, but Eli remains unsure of his brother's motives.

Arriving in Belfast, Nucky and Owen meet with IRA leaders with a barter proposition. Meanwhile, in Atlantic City, Jimmy and his partners broker a deal with George Remus for his “medicinal” alcohol before taking a break to see/hear the Dempsey fight.

Nucky shows he still has a few tricks up his sleeve by finding another source for booze, so Jimmy and his partners look for a new moneymaker in Atlantic City.

Jimmy recalls his time at college; Nucky and Margaret discuss how to make the best of a potentially bad situation.

The approach of Nucky's trial has Jimmy thinking about reconciliation, while Margaret mulls an offer from Esther Randolph that will have momentous consequences.