Shūichirō Kiriyama works at the Limitation Task Force, the place where the cases which have reached the statute of limitations are destroyed.

Getting bored of his job, he decides to find a hobby, because it seems important to him to have a hobby.

So he decides to puzzle out the unsolved cases on his free time, helped by his coworker Mikazuki, who seems to have a crush on him.

A sendup of the stereotypical Japanese family: dad is a salaryman jerk, unable to relate to anyone; mom is a hopeless housewife; the older son is a moderate academic success; but the younger son is a rebellious goof-off for whom a tutor must be hired. The tutor, played by the prototypical bad boy actor Matsuda Yusaku, proceeds to blow the entire family apart.

As Haru emigrates from Japan with her family to the coffee plantations in Brazil, Natsu is left behind in the care of spiteful relatives. Losing all contact, each must make her own way in an unforgiving world. Hardships abound in the struggle to survive in war-torn Japan and in the face of anti-Japanese sentiment in Brazil, financial ruin, familial pressure, abandonment and lost love. However they also experience the precious joy of survival and success. Now, after 70 years, Haru comes back to Japan to find her estranged sister.