Narges and Nasrin are two elementary school girls who meet each other in a school festival and find out that they are twin sisters. Their parents were separated. Their mother was a dress maker, and their father was a composer and musician, but they have never told their kids about this. One of girls lives with their mother and another one lives with their father. The girls decide to change places, and their parents don't realize what they have done, because the girls look very much alike each other. The father is going to marry with his partner, Soraya.