Misa is a wife who devotedly supports her husband, Shoji, who runs a factory and company. She believed that her life was rich and that her happiness would last forever, but one night, her husband suddenly disappeared. Misa desperately searches for her husband and discovers several notes from her notebook left behind. A demonstration has occurred! Go to the mine immediately. Then, Misa comes to a mine on the southernmost island of Japan, where she meets workers who are dissatisfied with her husband's management.