Here is a description of the season, via The Hollywood Reporter:
The show’s fourth season is set in Kansas City in 1950, at the end of two great migrations — those of Southern Europeans immigrating to the U.S. and African-Americans leaving the Jim Crow South. Two crime syndicates in Kansas City, one Italian and one African-American, have struck an uneasy peace held together by the two families exchanging their youngest sons.
The 4th season of Fargo also features Jeremie Harris, Glynn Turman, Jeremie Harris, Glynn Turman, Corey Hendrix, Matthew Elam, Anji White, E’myri Crutchfield, Amber Midthunder, Jack Huston, Jason Schwartzman, Ben Whishaw, Jessie Buckley, Salvatore Esposito, Andrew Bird, Gaetano Bruno and Francesco Acquaroli.
This is Uzo Aduba’s second role with the network as she is currently shooting the upcoming limited series Mrs America about the establishment of the Equal Rights Act. In this series, she plays the African-American Congresswoman Shirley Chisholm.
Congratulations on your new role Uzo Aduba.