A documentary on the turbulent life and final years of Rui Itō (伊藤ルイ), the fourth daughter of the thinker Noe Itō (伊藤野枝)—who was murdered alongside Sakae Ōsugi (大杉栄) by the military police—and herself a civic activist. Beginning at age 54, Rui devoted herself to grassroots human rights movements. When diagnosed with cancer shortly before turning 74, she refused life-prolonging treatment and chose to die a natural death.