Times are tough in the small town of Yallaroo where Ally Simpson has lived her whole life. The whole area is in drought and people are going broke or moving away. So when Ally hears about a competition to win the trip of a lifetime to visit the Smithsonian Museum in the USA, she knows she's got to do everything she can to try and win. Ally enlists her best friends Harmony and Ping to help her plan the most impressive experiment she can imagine--to send a video camera to the edge of space, and prove once and for all that the earth is round. At first, Ally is pretty sure she's got the whole competition stitched up. But then, as one disaster after another derails her plans, she begins to learn the importance of staying grounded even while she's aiming for the sky ...