Hikaru lost her husband to illness three years ago and has been making a living as a sales clerk. One day, she receives news that her father-in-law, Yasuo, has taken a turn for the worse, so she visits his home to take care of him. However, she finds Yasuo completely senile, having forgotten even Hikaru herself. Hikaru is forced to balance her demanding job with the care of her father-in-law, but...