Jim is running away because he overheard Miss Watson planning to "sell him South" for eight hundred dollars. Jim wants to escape to Cairo, Illinois, where he can find work to eventually buy his family's freedom. Huck and Jim take a raft down the Mississippi River, planning to head north on the Ohio River, in hopes of finding freedom from slavery for Jim and freedom from Pap for Huck. Their adventures together, along with Huck's solo adventures, comprise the core of the book.
