This song, "Tras las Rejas" by Grupo Los de la O, is a letter from a son in prison to his mother. He's telling her not to cry and that he still loves her, even though he's in a cell. He reflects on his past, from carrying things in his backpack for school to later being involved in street life. He mentions how he represented his neighborhood and crew, saying he "no me gusta no tirar del gas" [I don't like not throwing gas] and how he "me gradué del barrio" [I graduated from the neighborhood] instead of getting a diploma.
He talks about getting caught because of some "ratas" [rats] and having to face the consequences. Despite being locked up, he assures his mother he'll be free again. He sends a shout-out to his brother, who is also smart and represents the neighborhood with respect. He acknowledges that what he's telling his mom probably "la destroza" [destroys her], but he did things to help. He asks for her forgiveness, saying the streets appealed to him, but his family is sacred. He promises her, "pronto yo lo pude ver" [soon I could see it], meaning he'll be home. It's a really heartfelt and honest look at his life and his love for his mother, even from behind bars.