Hannah Bourne-Taylor sets out to protect Britain’s declining swift population by campaigning for mandatory nesting bricks in new buildings. Starting without campaign experience, funding or influential contacts, she must attract public attention and persuade politicians that the birds sharing people’s walls need legal protection. Her unconventional Feather Speech, petition for a Parliamentary debate and encounters with government take her from personal commitment into public activism. Alongside the practical fight are trolling, self-doubt and the emotional strain of confronting environmental loss. The book follows the effort to turn love for a threatened species into lasting political change.