In a house nestled in the lush mountains of Onomichi, lives 100-year-old Tetsuyo Ishii, who lives alone. In her younger days, she worked as an elementary school teacher. After losing her husband at the age of 83, she has been living with the support of her niece and neighbors. Despite the increasing challenges that come with age, Tetsuyo skillfully encourages herself and adapts her lifestyle with a free spirit. This documentary captures her daily life from the age of 101 to 104, offering insights into how to live joyfully in old age.