Apples on the Moon

Ali isn’t like her sister, Julia. She keeps to herself on the Lunar Colony where they live with their parents. But when Julia offers her an opportunity to buy apples, a rarity on the moon, she goes along, enticed by the idea of seeing Kofi, whom she’s had a crush on for ages. When some of the kids decide to mess around with an airlock’s controls, it’s up to Ali to figure out a solution. Will she be able to save the kids before time runs out?