Andrés, the best in the class, meets Rina, a beautiful extroverted girl who is not dedicated to studying, she would be his new partner. They were in exams and Rina decides to approach Andres with her charms, showing interest in him, so that he will help her. Andrés agrees, she takes advantage of him to the point of doing exams for her.

Alan, Andres's cousin, warned her that she was using him, but he did not pay attention to her. Days later, Alan sees Rina with another boy kissing, takes a picture and sends it to his cousin. Andrés very upset, think well to do, and invites her to his apartment, seduces her but she invented a thousand excuses and managed to sneak away.

The next day was the final exam, they arrive at the class, Andrés passes Rina the exam that she would present which said: