Sadako is reluctant to his plan, and although she lets go of her intention to poison him during their burdensome walk through a snowy landscape, he eventually dies of his heart disease. At the end of the film, Sadako has found the self confidence to file a suit against her husband's family to be included in the family register.
Sadako, a corpulent young woman, lives with her common-law husband Koichi, a librarian who has an ongoing affair with his colleague Yoshiko. Although she looks after Koichi's little son from a previous marriage like a real mother, his family picks on her and denies her being written into the family register.