Huckleberry Finn, a somewhat illiterate boy and the son of Ron Perlman, lives a challenging life under the care of his abusive foster family. His world takes a drastic turn when his father, Pap Finn, a drunken and volatile man portrayed by Ron Perlman, arrives unexpectedly, forcing Huck to leave his comfortable foster home and return to his tumultuous first family. Pap, driven by greed and jealousy, becomes violent when he learns Huck is in possession of money, attacking him in a fit of rage. After a fierce confrontation, Pap eventually collapses from exhaustion, leaving Huck to fend for himself.
Fearing imminent danger and unable to face his father, Huck decides to fake his own death and runs away, setting off on a perilous journey down the Mississippi River. He is joined by Jim, a slave played by Elijah Wood, who has escaped slavery after being threatened by a slave trader. Their goal is to reach Cairo, Illinois, where Jim can gain his freedom without fear of arrest, as the law at the time would not pursue runaway slaves into free states.
Throughout their adventure, Huck and Jim encounter numerous obstacles and adventures that test their resilience. One night, they discover a wanted poster falsely accusing Jim of murder—an unjust stamp placed on him for no reason. They also come across a sinking barge in the river, where Jim recognizes the dead body of Huck’s father. In a harrowing scene, Huck notices two robbers leaving one of their companions to drown in a flooded room as water rapidly fills the ship. Their own canoe is destroyed when the barge collapses underwater, but Huck and Jim manage to steal a raft from the wreckage and continue their journey.
Their voyage hits another obstacle when a steamboat strikes their raft, causing Huck to be captured by men who attempt to take him into custody. He is soon taken to the home of the Graingerford family, embroiled in a violent feud with the Shepherdsons. To protect himself, Huck fabricates a story about his identity, cleverly avoiding suspicion while navigating the dangerous family rivalry. His visit becomes even more complicated when he befriends Billy Graingerford, the family's son, only to be horrified when Jim is discovered and identified as a slave. The intense feud erupts into a brief, deadly firefight, slaughtering the male Graingerfords—including Billy—while Huck desperately tries to stay out of harm's way.
Eventually, Huck and Jim manage to escape past Cairo. Their journey soon involves two con artists, known as The Duke and The King, who join their adventure, bringing a series of scams and deceptions. They land at Phelps Landing, where The King and The Duke hatch a scheme to impersonate members of the Wilkes family—believing they can swindle three sisters, Mary Jane, Julia, and Susan, out of their inheritance.
Meanwhile, Jim is falsely accused of Huck’s murder and ends up in prison. Huck, feeling responsible, is distressed over Jim’s predicament. He later learns startling truths about Jim’s late father, which leads him to reconsider Jim's innocence. Huck devises a plan to free Jim by placing the stolen money in a coffin belonging to a deceased Wilkes family member—a clever scheme to deceive the authorities. The next day, Huck exposes the con men, saving Jim and warning the Wilkes sisters about the scam.
As danger escalates, the townspeople, suspicious of The King and The Duke’s scheme, unmask the impostors, leading to their tar-and-feathering and the arrival of an angry mob. Huck, in a daring move, breaks Jim out of prison, but in the chaos, Huck is shot in the back. Jim chooses to sacrifice his own freedom to save Huck, carrying him through the mob’s wrath and risking his life by allowing himself to be hanged. Thankfully, the townspeople, led by the sincere Wilkes sisters, intervene just in time, and Jim is freed from captivity.
The story reaches its conclusion when Huck wakes up in the Wilkes homestead, learning from Anne Heche that Jim’s owner, Miss Watson, who had been caring for Huck as well, has passed away, leaving Jim legally free. Despite attempts by others to civilize and contain him, Huck remains skeptical, reflecting, “I’ve been there before.” For Huck, the adventure signifies a journey from innocence to awareness, filled with moral challenges and moments of courage. The story ends with Huck running off into the sunset, symbolizing his ongoing quest for freedom, adventure, and a better life.
