Judy and Peter enter Jumanji for Alan's birthday with the clue "Release the thing you most adore, it comes back closer than before." During the trio's picnic, Peter annoys Judy when he gives Alan Judy's Swiss Army Knife as a gift. They are attacked by a swarm of giant Jumanji ants, then by a giant centipede when they flee into a cave. They escape the centipede by going upriver in a raft, but Alan was bitten by the centipede. The green venom flows through his veins toward to his heart. if it does, he'll die. Alan collapses when they reach shore, and the children bring him to shelter. Peter vows in anger that he'll destroy the game if Alan dies. Without noticing, The Vengeful Grim Reaper, Stalker overhears with the microphone, disguised as a flower plant. Stalker vows to kill the children and Alan in order to protect Jumanji, enlisting Slick, Van Pelt, and Ibsen to do the task. Alan dips into a magic pool that allows him to rest and shows his dreams in the water. Peter tricks Jumanji into letting him return to the real world (by pretending his cap is the thing he most adores), where he tries to find a cure for the bite. He fails as the game realizes his lie and sucks him back in, transforming him into a frog. Judy ventures to Slick's looking for a cure. Instead, he gives her "Jumanji Tracking Juice" in exchange for her shoes which reveals her footprints and allows the evil trio to hunt her. The three apes deplete the juice before the villains find her. Peter journeys to the Manjis to meet Tribal Bob, who is being watched by the villains. He does plant a small statue on Peter's head without Peter noticing, who is then stalked by the villains. He manages to elude them, and Judy finds the statue, of a mosquito. They realize a Jumanji mosquito can suck out the venom from Alan's veins. But upon capturing one, the villains attack, armed with weaponized vehicles from Ibsen. The kids elude them, and Tribal Bob and the Manjis carry off the villains. Judy and Peter arrive to cure Alan, but are confronted by Stalker himself. As Peter fends him off, Judy tries to cure Alan, when in the pool she sees Alan is dreaming about when he entered Jumanji. She needs only a few seconds to see the clue, but Alan is closer to death than that. She relents when the venom reaches Alan's heart and has the mosquito suck out the venom. The mosquito then crashes through the image, destroying it just before they can get the clue. Fully healed, Alan then shoves Stalker off a cliff and down to the bottom of the waterfall, saving Peter. Judy gives Alan her knife as a gift having learned from his dreams that he considers them his family and it solves the clue and Peter returns to normal. Alan promises that they'll finish his party when they return as they leave. After Judy and Peter leave, Stalker emerges from the water and vows for more revenge someday.