Two babies girls are born, one from a rich doctor's family, the other in the family of a fisherman. An accident occurs during the absence of the doctor, and his daughter is burnt and injured. Ignoring the advice of his wife to apologize for the wound, the fisherman decides to exchange the babies. So they raise Shinobu, the daughter of the doctor, while Chizuko, their real daughter, is raised in the doctor's family. Eighteen years later, their paths cross, their fate continues to be deeply intertwined.