Shin Ki-soo spent his life collecting visual materials, and drew upon them to make this film about the history of zainichi Koreans in pre-war Japan. From the massacre of Koreans at the construction site of the Nakatsugawa hydroelectric power plant in Niigata Prefecture and the joint struggle of Korean and Japanese factory girls at the Kishiwada cotton mills to the dispute at the Sanshin Railroad construction site in Aichi Prefecture and the strike at the Aso coal mines in the Chikuho region of Kyushu, this film uncovers and assembles valuable testimony from many people who played key roles in the movement to free Korea from Japanese colonialism.