Jack DiNorscio, a low-level mobster, faces a daunting legal challenge when he is indicted in a massive RICO case against the Lucchese crime family. The trial becomes one of the longest in American history, and Jack, tired of being betrayed by those he trusted, decides to represent himself in court despite having no formal legal education. This decision shocks his fellow defendants and the legal professionals involved, including the judge and the prosecution team. Jack's unconventional approach to his defense, filled with humor and sheer audacity, makes the courtroom a spectacle and garners mixed reactions from everyone present.

As the trial unfolds, Jack’s charisma and street-smart arguments start to make an unexpected impact on the proceedings. He relentlessly questions witnesses, challenges the prosecution’s evidence, and presents his case with a blend of sincerity and theatrics. His unorthodox methods put considerable strain on the prosecution and introduce doubt into the minds of the jurors about the integrity of the government's case. Throughout the trial, the camaraderie and tensions among the defendants, lawyers, and families are explored, painting a vivid picture of loyalty, betrayal, and the quest for justice.