Thirteen-year-old Bo grows up in a protected environment where everything seems possible, but she is frightened by the dark predictions of the future. Together with her friend Luka, she decides to take up the fight against climate change and they join Extinction Rebellion. They occupy factory sites and highways, they are arrested and criticized. But what are politicians doing? Why does all this take so long? As Luka proposes increasingly radical actions, the more thoughtful Bo wants to find her own way. But how can she continue in a world that is eating away at her own future? PLANET B is a coming-of-age story of two youngsters exploring how to grow up in a world destroying itself.