In the summer of 1910, an unimaginable wildfire devoured more than three million acres across the Northern Rockies, confronting the fledgling U.S. Forest Service with a catastrophe that would define the agency and the nation’s fire policy for the rest of the 20th century and beyond. The film provides a cautionary tale of heroism and sacrifice, arrogance and greed, hubris and, ultimately, humility in the face of nature’s frightening power.