A boy narrates his escape from a troubled home and a voyage down the Mississippi on a raft with an enslaved man who hopes for freedom. Their journey unfolds in episodic encounters—family feuds, fraudulent nobles, small-town spectacles, and narrow escapes—that combine humor, danger, and social observation. Faced with practical choices and moral dilemmas, the narrator gradually questions the racial attitudes and hypocrisies of his society. Regional dialects, vivid river landscapes, and satirical episodes are used to examine themes of liberty, conscience, and the difference between legal authority and true justice.