An incredible series simply perfect, complex and deep protagonist Carlos Valdivia a character who came from a more privileged world, is put in jail and returns to his reality only to see a totally different world "same world, different classes" his evolution, motivations, conflicts are well written and his evolution with his students is simply beautiful, strong themes such as the lack of opportunities in vulnerable sectors, the gap between social classes, school and family, the abandonment of the state in public education and more perfectly executed and treated, 10/10 performances and although much of the cast were not professional actors, they made it easier to show the harsh reality that existed, intelligent and well-structured script, absolutely each chapter has a self-inclusive message without stopping advancing the plot, moments of social criticism, traumas, and humor, natural and real dialogues from the Chilean street, school, and the upper social classes without sounding forced, a good soundtrack that is well executed in every second of the series make this series one of the best series Chilean history is simply the harsh reality of Chile made into a masterpiece. I hope that one day this series will be revived; it deserves it for everything it achieved and its cultural impact, which made even the country's teachers reflect.