A hit man hijacks a boat — and the married couple aboard — in order to carry out a contract on a dictator in the Caribbean.

Under therapeutic hypnosis, a seemingly well-adjusted young woman tells a fantastic story, verified by lie detector, of her forgotten marriage to a man who disappeared on the day of their honeymoon, and of her search for him which takes her to a lonely mansion in a remote section of swampland tenanted by snakes, alligators, a drunken one-armed lout, a mysterious doctor, and a cold-hearted elderly woman who lives alone in a brooding manse.

When Missouri farm boy Jesse James witnesses the lynching of his father by the Yankees, he forsakes his family's homestead to find his brother Frank, a soldier in Quantrill's Raiders, a renegade band of Confederates. Bent on revenge, Jesse begs to join the raiders.