Seventh grader Haven is obsessed with climate change—so obsessed that she has what’s called “eco-anxiety.” Not only is she doom-scrolling compulsively, she’s also inattentive in class, not sleeping, biting her nails to nubs as she worries about catastrophic weather events. An empathetic social studies teacher suggests that Haven focus on something specific where she can make a difference. So when Haven’s science class begins a study of a local river, she channels her eco-anxiety into a mission to save the water from pollution she believes is caused by the town’s new glass factory—where her own dad works.