Left on the doorstep of a monastery as an infant, Marcelino was raised by the monks. He was well-cared for but lonely and missed having a mother. One day he found a special friend in the forbidden attic, hanging on a cross. A friend that would repay Marcelino's kindness by granting him one heart-felt wish.
Diego Acuña was one of the five thousand children taken to Russia during the Spanish Civil War. He was educated in the communist pedagogy and prepared for a career as an agitator that developed in France and Italy under the command of Goeritz, one of the party officials. One day he was commissioned a delicate mission: assisting in the murder of his father, because he turns out to be a major obstacle to the illegal actions of communism. To do so he moves to Spain, pretending he is bored of Soviet doctrine
The old hidalgo Don Alonso Quijano, maddened by the excessive reading of books on chivalry and determined to become a famous and heroic knight-errant, leaves his village and sets out on the road in search of adventure, accompanied by his faithful friend Sancho Panza.
Eugenio asks his best friend, Federico, a wealthy lawyer, to take care of his son Titín while he deals with a family problem related to Elvira, his wife; but Federico, a single man, knows nothing about babysitting, so he begs Clarita, his secretary, to help him… (Film partially lost. Only 65 minutes of footage remain of the original 91; but this circumstance does not prevent the understanding of the plot.)
Rogelia, the orphan of an Asturian miner who died in a work-related accident, marries Máximo, a man as robust as jealous, drunk and violent. But when her husband is jailed, the woman will take advantage to escape with the doctor of the village so as to see the world and perhaps to form a family.