Spain, March 1964: Quico is a very naughty child of three belonging to a wealthy middle-class family. Since Cristina's birth, he feels he has lost the privileged position of "prince" of the house for his eight months old sister. So, with his brother Juan, who is eight years old and is quite disobedient, spend their time committing prank after prank, causing the resulting anger of his mother, the nanny and the old housemaid. The rest of the family members are two much older brothers, his resigned mother and a retrograde father of authoritarian ideas. But many years have passed, and the civil war that won the despot Don Pablo is simply for their children "Dad's war".

Han pasado tantos años que la guerra civil que ganó el autoritario don Pablo es para sus hijos "la guerra de papá". Esta es la historia de la vida cotidiana de una familia acomodada desde el punto de vista de Quico, un niño de cuatro años que acaba de ser “destronado” por su nueva hermanita.