In the valley where the river is drying up, the air is filled with smog, and people’s health is increasingly at risk, 12-year-old Jonas must believe that even the smallest acts can make a difference. But this isn’t easy when he faces bullying at school and worries about his little brother’s health as well as his father’s declining job situation.
When Jonas decides to investigate the ancient mystery of the river, he finds himself caught up in an exciting adventure.