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.