Open-minded, idealistic, funny and self-confident, Sandra is the one who makes the first move with Marcos, the classmate she has a crush on. She, along with Raúl, a new guy who is a bit of a freak, form a group of very different friends who are eager to find their place. Suddenly, his illusions are shattered by a terrible incident: Marcos's father is found murdered and everything points to his son, an apparently normal boy, being responsible.

Raúl has just arrived at the institute. Overprotected by his mother, he tries to hatch and find his place. He seems like the typical geek, but Sandra and Marcos see in him an enthusiastic and fun boy, with peculiar musical tastes. He soon falls in love with Sandra, but knows that she likes Marcos. Raúl is also attracted to him and doesn't understand why the three of them can't love each other. He will suffer a severe blow with the arrest of Marcos for the murder of his father.