查拉（阿曼多·巴尔德斯·弗莱雷ArmandoValdesFreire饰）出生于一个位于社会最底层的贫穷家庭之中，父亲在很早的时候就离开了他，母亲深受毒品之苦，根本无暇照顾和关心查拉。必须自食其力的查理以训练战犬维生，这导致他的性格非常的冷漠而且暴力。学校里，所有的人都认为查拉是一个无可救药的孩子，只有他的班主任卡梅拉（阿丽娜·罗德里格斯AlinaRodríguez饰）不这么想，她觉得查拉只不过是一个极度渴望爱的善良男孩而已。卡梅拉生病了，需要住院，新老师接手了她的班级。新来的老师并不是一个耐心的人，他误解了查拉的种种举动，并且最终将他送进了少管所。 Quién lo impide is a call to change our perception of adolescents and youths; our idea of those born in the early 21st century who have recently reached adulthood; those who now seem guilty of everything as they themselves see their hopes dashed. Somewhere between documentary, fiction and pure testimonial record, the young adolescents show themselves the way they really are, the way we rarely see them, or the way they let us see them: taking advantage of the film camera to show off the best of themselves and renew our trust in the future; from fragility and emotion, with humour, intelligence, beliefs and ideas. Because the young people who speak to us about love, friendship, politics or education refer not only to their own situation, but to the things that always matter to us, at any age. Quién lo impide is a film about ourselves: about what we were, what we are and what we will continue to be. 
