George and his best friend, Annie, have been selected as junior astronauts -- part of a program that trains young people for a future trip to Mars. This is everything they've ever wanted: They get to be a part of up-to-the-minute space discoveries and meet a bunch of new friends who are as fascinated by the universe as they are. But when they arrive at space camp, George and Annie quickly learn that strange things are happening on earth as well as...