Johnny Durán, who is seventeen years old and son of a multimillionaire, arrives to Madrid for hollidays. In the capital he become friend of a group of boys and girls with whom he shares great moments; but soon he realice that they are a clan of thugs and decides to distance themselves. He also meets Paula, daugther of an italian family that is travelling, and they both feel atracted by each other. Since then, started happening a serie of unexpected events which the guy will have to solve with tenacity and responsibility.

Andrés' parents, in Madrid, and Pierre's parents, in Paris, have agreed to a school exchange for their children during the summer. However, when they go to the station to pick up Pierre, 10 years old, they meet an attractive young woman who takes his place. The presence of Ivette is a shock to the family, especially for the older son, who is strongly attracted to the French.

Mario, the son of a police captain killed in the line of duty, is completely surrendered to the police organization. Instructing some errands meet Elsa, original and fascinating beauty, beginning an illicit affair and exciting. This makes his firmest principles are shaken, transformed his life completely absurd entering a maelstrom revolving around the existence of Elsa surface.

The racing stables of Gandia family go to auction. Tomy, son of the owner, manages to save his favorite horse, "Cantador". Now, his only obsession is to resolve the problems of his father, providing him a new wife and riding his horse at the races. After a while, in the Official Prize, "Cantador", ridden by Tomy wins. This fact causes everyone to be interested in the horse and eventually Tomy will be forced to auction it to liquidate their debts. But the new owner is the father of Luchy, Tomy's classmate , and he will do everything possible to recover it.