While at the home of his grandfather, Eddie, Spencer decides to fix the Jumanji game because he misses his friends and their adventure. After Bethany, Fridge and Martha realize that Eddie has possibly disappeared back into the game, they go into the basement to investigate. Yet, the video game is glitchy and soon they find themselves getting sucked into it before they've even chosen their avatars. In the game, the friends then make a horrifying discovery: Eddie and his best friend, Milo, have also been sucked into the game. Eddie has taken on Dr. Smolder Bravestone's avatar and Milo has become Franklin "Mouse" Finbar. With the clock ticking and danger at every turn, they must find Spencer and escape to the real world.