Exodus

Ned, Poe, Henry and Little Boy are hunting Hogan, who is fleeing along the Mississippi aboard a river submarine. During a stop, they come across the murder of a champion of black rights in America. Former slaves are leaving the South, hoping to find better living conditions in Kansas, but their masters don't want to let them leave. Racist gangs chase the fugitives, checkpoints have been set up along the river and supporters of the cause of black emancipation are threatened or eliminated. In such a state of tension and alarm, enemies emerge everywhere and the hunt for Hogan risks becoming desperate...