In Joy, Az a seven years old girl lives in a small village with her parents and soon will have a baby sister. It is the most joyful moment in her life. But this joy wouldn't last long, because her mother dies after the birth. Tseden the grieving husband, will raise their daughters in a difficult condition. But Az will struggle with all those difficulties, becoming strong and smart and taking care of her whole family. Tsende's sorrow will disappear as time passes and he starts to sell milk in the city. Meanwhile, the two daughters stay home alone for a few days. As their life gets better sad news comes from the city; Tseden dies in an accident.