Their only daughter, Nozomi, has fulfilled her childhood dream by passing an audition to become a dancer at a famous theme park. At Nozomi's husband Takahiro's invitation, Sayuri and her husband accompany them on a celebratory hot spring trip... And so they arrive at a hot spring inn. Since it's been a while since they last went on a family trip, Sayuri relaxes in the bath and ends up drinking too much alcohol, even though she isn't used to drinking. How much time has passed since then? Nozomi and her husband are nowhere to be found in the room, and Takahiro is left alone with Sayuri...