Set in Tokyo in 1940, the peaceful life of the Nogami Family suddenly changes when the father, Shigeru, is arrested and accused of being a Communist. His wife Kayo works frantically from morning to night to maintain the household and bring up her two daughters with the support of Shigeru's sister Hisako and Shigeru's ex-student Yamazaki, but her husband does not return. WWII breaks out and casts dark shadows on the entire country, but Kayo still tries to keep her cheerful determination, and sustains the family with her love.