Kokoro is under constant pressure from her in-laws to give them a grandchild. At her mother-in-law's suggestion, the whole family takes a hot-spring trip, but Kokoro is ordered to abstain for the month beforehand to improve her chances of conceiving. On the trip, her husband refuses her advances, while her father-in-law is likewise rejected by his wife. Both sexually frustrated, Kokoro and her father-in-law head to the baths to cool off—where he happens to see her bathing...