Kyoko, a wife, takes care of her husband's father, Yasuo, every day. One day, Yasuo mutters, "I want to go to a hot spring before I die..." This triggers the family to go on a trip to a hot spring. On the day of their trip, when they arrive at the inn, Kensuke receives a call from his boss at work, and he has to return to work immediately... The two of them, far from their daily lives, become immersed in the forbidden act of caring for him...