It tells the story of Hamaoka Taeko, a 52-year-old ordinary housewife who lives with her older husband and their son. She doesn't have any particular hobbies and has just been living her life while juggling child-rearing and part-time work. Despite working hard as a housewife and a part-time worker, she finds herself being looked down upon by her family, who tell her “You know nothing about society.” However, amidst this, she begins to feel as though someone is following her or watching her with strange, suspicious glances both at her workplace and in her daily life. The beginning of a startling change in her life.