In a small Spanish town, during the Christmas holidays, a group of rich old ladies organize a peculiar event that consists of inviting a homeless person to sit down to dinner at their wealthy table. Plácido, a humble worker, is hired by the organizers to participate in a parade with his three-wheeled vehicle, a seemingly simple mission that will not be easy for him to accomplish.

The brother of a condemned man kidnaps the son of the warden to blackmail him. But the director, firm in the line of duty, does not agree, so the criminals decide to get rid of the child. After seven years, the kidnapped boy lives with tramps and together with another child sings along the streets to earn money while committing rogueries

For medical advice, Carlos and his wife, Julia go on vacation to a fashion beach. The hotel gets a new host, Roldós, known seducer of scandalous history that lives in the suite next to the couple. Julia hears a piano melody and below the door finds a message asking her to meet in one place. Faced with this audacity, Julia reacts with dignity but curiousity as well. The recklessness of the seducer gets to the point that Carlos realizes this 'relationship' causing a scene of jealousy. Blinded by deception, the follows the supposed rival and Julia and the other people in the hotel heard gunshots. An inspector arrives to investigate the disappearance of Roldós and all suspicion falls on Carlos.