Two squabbling brothers are propelled into deepest, darkest space while playing a mysterious game they discovered in the basement of their old house. On their fantastic journey, they are joined by a stranded astronaut and must survive several outer space challenges. Unless they finish the game and reach the planet Zathura, they could be trapped in outer space forever.
Two young brothers are drawn into an intergalactic adventure when their house is hurled through the depths of space by the magical board game they are playing.