For more than a decade, wildfires of unprecedented force have been devouring our lives, homes and forests at a steady pace. Each year, 350 million hectares of forest go up in smoke, the equivalent of six times the size of France. In the US, the fire season now lasts up to two months longer than a generation ago, and the surface burnt annually has multiplied by three. This film sets out on a gripping journey of investigation from Europe to the US, Canada, Brazil and Indonesia to follow the work of a global team of dedicated firefighters, scientists and fire experts as they investigate why our forests are going up in flames, and act on an unexpected discovery: if we want to save our forests, homes, health and our climate, we need to radically change our attitude towards fire and the way we fight wildfires.

• Documentary