In the early Showa era, the town of Choshi in Chiba Prefecture was divided by the conflicts between the worlds of "land" and "sea". Born to Kyubei Bando, the owner of a long-established soy sauce brewery, and his mistress Rui, Kaworu was taken in by her father and raised as a prim and proper lady. As she grew up, she fell in love with Sokichi, the eldest son of an established fisherman; alas, their two families were in conflict. This is a story of pure love between two people that grew beyond the boundaries of the old customs that they were brought up with. It is a drama that depicts their turbulent journey of love and the bonds of the people from an old and established family working tirelessly to protect their naturally brewed soy sauce business through the ups and downs.