It’s 1940, and the population of Japan is divided over its entry into World War II. Satoko, the wife of a fabric merchant, is devoted to her husband but is beginning to suspect he’s up to something. Soon she allows herself to be drawn into a game in which she enigmatically conceals her intentions.

Accompanied by his friend Miyata, Sano returns to Izu, a seaside resort in Japan where five years before he fell in love with his wife Nagi.