Cady follows the Bowdens to their houseboat on the Cape Fear River by strapping himself under their Jeep Wagoner. He then rents a boat and follows them to the spot where they have anchored. As they're eating dinner, the houseboat is caught in a squall. Sam goes out to check the anchor, but he is knocked out by Cady, who then cuts the anchor line, setting the boat adrift. He enters the cabin and comes on to Danielle, but she grabs a pan of hot water and tosses it on him. Cady locks Danny in the hold and begins to molest Leigh. Suddenly, Cady stops, pulls Sam into the cabin, and releases Danny from the hold, while Leigh tries to proposition him in order to protect Danny. Gloating, Cady lights up a cigar. Danny sprays him with lighter fluid, setting his head and shoulders on fire. Cady jumps in the water and Sam tries to steer the boat away, but Cady grabs the cut anchor line and climbs back aboard. Holding a gun to Sam's head, Cady holds a mock trial with Sam as the defendant and Leigh and Danny as the jury. Cady forces Sam to admit that he buried the report of his victim's prior sexual history, but Sam counters that her promiscuity does not justify rape. Cady declares Sam guilty of betrayal, then turns to Danny and Leigh and orders them to take off their clothes and get down on their knees. He tries to handcuff Sam to a brass rail, but the swirling waters knock everyone off balance. Sam forces Leigh and Danny to escape by jumping in the water. Sam tries to jump in after them, but Cady catches him by a pant leg. Sam breaks free, so Cady grabs a gun. While Cady looks around to locate Sam, Sam crawls along the floor and handcuffs Cady's leg to the rail. In the shifting waters, Cady can't get off a good shot, and the gun subsequently falls into the water. Suddenly, the boat hits a rock and is torn apart, washing them and parts of the boat to shore, Cady still handcuffed to the rail. Sam grabs a rock and hits Cady with it. They fight furiously until the rushing water carries Cady away screaming in tongues. The two stare at each other as Cady is slowly pulled under the water. Sam washes Cady's blood from his hands and joins Leigh and Danny. In the final scene, Danny (in a voiceover) finishes reading her reminiscence about the houseboat as the camera slowly focuses in on her eyes.