After their father is called into work, two young boys, Walter and Danny, are left in the care of their teenage sister, Lisa, and told they must stay inside. Walter and Danny, who anticipate a boring day, are shocked when they begin playing Zathura, a space-themed board game, which they realize has mystical powers when their house is shot into space. With the help of an astronaut, the boys attempt to return home.
When siblings Judy and Peter discover an enchanted board game that opens the door to a magical world, they unwittingly invite Alan -- an adult who's been trapped inside the game for 26 years -- into their living room. Alan's only hope for freedom is to finish the game, which proves risky as all three find themselves running from giant rhinoceroses, evil monkeys and other terrifying creatures.
Married couple Bob and Susan Howard decide to see a marriage counselor named Judy Small, who appears trustworthy but harbors dark and conflicted impulses.
