Problems of foreign laborer

Hisako, the heroine of the story, came to her father's land after having had been assaulted her Brazilian house by the robber.

She began to work as caddy. Her son, who also worked for another company, suddenly had been killed in an absurd accident. The story tells how she cope with this incident.
She was helped by many Japanese.

Meanwhile, the history of her family, Brazilian public security, economy etc. are also told,