Looks back 20 years into the past of an elderly woman who died of heatstroke and paints a picture of a solitary woman's genuine despair.

Why did she die? The Supreme Court first sentenced her to death, but then commuted her sentence to life imprisonment and sent her to Tochigi Women's Prison. What happened before she took her own life there? Based on her tanka poems, which convey her raw voice, the film explores her lone fight during the 121 days between her death sentence and suicide, a period that has remained obscure to date.

A drama depicting the world of the female writer Midori Osaki in three parts: the dramatic creation of her masterpiece, "Wanderings in the Realm of the Seventh Sense," her unknown years spent in poor health and poverty, and the present-day world from which we see her work.