April and Andy have a dinner party; Ben turns to Leslie for career advice; Ann goes to a singles party.
Chalky encounters Narcisse in Harlem; federal agents enlist the help of Eli and Van Alden to take down the Capone organization; Nucky is pained by a recent loss; in 1897, Nucky vents his frustration and roots out a young thief.
Ron becomes upset when April mistakenly schedules meetings for him; Leslie fights to preserve a historic landmark.
Nucky tries to hold onto his assets in Atlantic City; Willie and Eli become involved in Nucky's war; Maranzano meets his fate; Nucky reads a letter from Gillian; in 1897, Mabel and Nucky argue.
Diane raises eyebrows while settling in as a new partner at Reddick, Boseman & Kolstad. Maia continues to deal with the repercussions of her family's Ponzi scheme. Lucca and Maia unexpectedly pick up a new case.