Yoriko draws fine ripples in the sand every morning as she tends to the Zen garden in her yard, which seems incongruous with her modern house in its quiet residential area. Yoriko is devoted to a cult-like religion and spends her days in prayer and study. One day, her husband Osamu, who abandoned his family over 10 years ago, comes back. His return is like a rock that makes ripples on the quiet surface of her life.