en Cuevana 3. On the eve of the summer vacations, Marc (16 years old) only dreams of one thing: seduce Sonia. Tonight, he has decided to confess his love for her. But while he performs a balancing act to impress her, he is taken by a dizzy spell and is victim of a fainting spell. He is rushed to the hospital and the doctors discover that he has leukemia. A race against time begins: the disease and Sonia's love become Marc's two challenges.