Mauricio is a typical loser at school, where other students constantly make jokes on him. After finding the janitor Elias having sex with Maria the nurse, Mauricio receives a Cachiflin (relaxing suppository) from Elias as a way of thanking him for not saying anything to director Amparo. Mauricio gives this drug to his best friend Esteban, who uses it before an exam and does very well. Mauricio begins to think about selling this drug as a business at his school.