This is the story of a family with two young daughters, whose happy life suddenly falters. Aged eleven, the eldest stops eating and speaking, and her younger sister struggles to cope. Slowly, alongside diagnoses of autism and selective mutism, their desperate parents become aware of the reason for Greta's distress: her imperilled future on a rapidly heating planet. Against forces that disparage and try to silence them, they discover ways to heal, strengthen and act. And then, one day, fifteen-year-old Greta decides to go on strike.