The story is set in the town of Lawless, Illinois during Prohibition, where brewed liquor dominates the black market. Angelo Lagusa, a young man whose family was murdered in a mafia dispute, seeks revenge against the Vanetti Family, particularly its don, Vincent Vanetti. After seven years in hiding following the night of the murder, Angelo receives an anonymous letter from a friend of his father's, prompting him to return to Lawless and exact his revenge. Under the name of Avilio Bruno, he begins to infiltrate the Vanetti Family by slowly befriending the don's son, Nero. However, in this dramatic 91-day story, revenge breeds revenge, and killing may yield drastic consequences. How will Angelo Lagusa and Nero Vanetti fare, in this tragic harvest field that they have only begun to sow?