October 1967 produces two disasters an ocean apart, and this film built from David Maraniss's book They Marched into Sunlight follows both. In the jungle near Saigon, a U.S. Army battalion walks into a Viet Cong ambush that kills 61 soldiers in a single afternoon, a massacre the Pentagon initially tries to spin as a victory. At the same time, on the University of Wisconsin campus in Madison, students riot against Dow Chemical recruiters, the company that manufactures napalm, and police respond with tear gas and clubs. The film cuts between the two locations to argue they were never really separate: soldiers dying in a war that a growing share of the country no longer believed in, and a generation at home deciding that campus protest was now a legitimate battlefield. Archival footage and firsthand accounts from both the ambush survivors and the Wisconsin demonstrators carry the story, tracking how one October changed what Americans were willing to accept about the war and about each other.