A pair of bickering brothers must put aside their differences if they want to survive and save their elder sister, when the board game they are playing comes alive and flings them, together with their house and elder sister into outer space. The boys soon realize that there is only one way to get back to Earth - keep playing to finish the game. But at every turn they make, they face even harder...

A pair of bickering brothers must put aside their differences if they want to survive and save their elder sister, when the board game they are playing comes alive and flings them, together with their house and elder sister into outer space. The boys soon realize that there is only one way to get back to Earth - keep playing to finish the game. But at every turn they make, they face even harder challenges, including a murderous robot, an explosive meteor shower and lizard-like aliens.