In prohibition-era Chicago, Guy Gisborne seizes control of the rackets after bumping off Boss Big Jim. Only Robbo wants to keep his own territory. Joining forces with a pool shark from Indiana and the director of a boys' orphanage, Robbo is cheered as a modern-day Robin Hood when he donates money to the orphanage. Meanwhile, Big Jim's heretofore unknown daughter, Marian, goes from man to man trying to find an ally in her quest to run the whole show.