Mibôjin onsen: Onnayu de unagi nobori.

Komako lost her husband, Takuya, three years ago and has been running a mountain hot spring inn by herself, but the business is in dire straits. The landowner, Daikokuda, is plotting to take over the inn and take Komako as his mistress. However, Komako has sworn to herself that she will protect the inn that her late husband left her. Then one day, her only daughter, Kaoru, who had left home and never returned, suddenly comes back with her boyfriend, Tatsuo...