A young horse with a hooligan character settled in a family where there are already three sons, and the mother is pregnant with the fourth. The father of the family is trying to cope with the restive horse and life. But the mother truly keeps the family, whose talent for painting is increasingly drowning in the cares of the household courtyard. The only outlet for her is the horse Luna, which personifies the youth and lightness of a girl, erased by years of marriage and peasant life. A yoke and a cart are also waiting for the moon, but is it so easy to handle this horse?