A medicine man on the last show boat on the Mississippi is mistaken by two gangsters as a bootleger, and has to envade them.

At the offices of Consolidated Producers Corporation, producer Tony Paton is determined to make a film about the great African American chemist, George Washington Carver. His backer, Murphy, is skeptical about the marketability of such a project, but Paton convinces him that it is time to depict the truth about races, creeds, and religions.

Art curator George Steele experiences a train wreck...which never happened. Is he cracking up, or the victim of a plot?