Rain has not fallen for 5 Years, and as a result, water is now the most sought-after commodity. Just like everyone else outside the fortified cities, Momo has been finding it hard to acquire water. Her journey to a trading post takes an unexpected turn, when she encounters a young, orphaned girl. She appears to be the lone survivor of a recent accident. Conflicted, Momo must decide whether to take her along on her quest, or to keep to her loner ways.