A group of high school students are followed as they attempt to confront the various struggles that come with life, love and friendships.

On the last day before Prohibition, Nucky Thompson condemns alcohol before a temperance group and later tells his ward bosses his plan for bootlegging.

Agent Nelson Van Alden visits Nucky as he probes a crime he believes his suspect didn't commit; Nucky calls his brother, the sheriff, to circle the wagons.

Nucky, Federal Agent Nelson Van Alden and gangster Arnold Rothstein each try to get to a hospital patient who knows about a multiple murder in the woods.

Jimmy Darmody visits Al Capone in Chicago and finds they have different ideas of how to run a business; Nucky tries to get more roads built to Atlantic City.

As Nucky prepares for a very profitable St. Patrick's Day, Margaret feels neglected and gives federal agent Van Alden a tip about a beer shipment.

Nucky gets tough with Lucky Luciano after one of his ward bosses is robbed; Margaret stands up to the owner of the dress shop and then accepts help from Nucky.

Nucky has his childhood home redone after his father is hurt in a fall; Chalky White considers a supplier's offer that would allow him to bypass Nucky.

Nucky travels to Chicago to attend the 1920 Republican National Convention and while he's there, he gets bad news from Atlantic City about a potential gang war.

Nucky gets his men ready for a gang war as Jimmy continues to swear he has nothing to do with it; Margaret goes out of her way to help Madame Jeunet.

Nucky asks Margaret to stay loyal to his side; Jimmy's violent side takes Angela by surprise; Agent Van Alden's emotional conflicts interfere with his work.

Nucky makes some big changes to shake things up; Jimmy is beset by family problems; Van Alden has a stern discussion with Agent Sebso about his temptations.

Nucky Thompson and his town anticipate change after the 1920 elections; Torrio gets two nemeses together to cut a deal that will affect the future.

Nucky is shocked to find that some of those he trusts are considering rebellion; an attack endangers Chalky; Margaret tries to deal with her son's behavior.

Nucky discovers betrayal among his most trusted confidants; Jimmy considers his options when presented with an opportunity to form an alliance.