It starts with the brutal murder of a man, allegedly at the hands of his son Marcos, a teenager with no apparent problems. The incident falls like a jug of cold water in the day-to-day life of a high school where students and teachers wonder what has gone wrong for a popular, almost perfect boy, who has ended up committing such a crime. Throughout the episodes, we will learn more about this enigmatic young man and his surroundings, from his best friends, to his life in high school, through the harsh family events that he has had to face in recent months.