An adopted girl, Selma, is excluded from her circle of friends, when her sister Irma convinces the other girls to exclude her because she’s boring. Selma’s and Irma’s mother, Amparo, notices something strange in Selma, but Selma tells her that she is like that because she has a lot of school work. The girls younger brother eventually figures out what is really happening.
Petra, a 60 year old grandmother, is facing a great challenge, make her rebel granddaughter, Vicky, learn the meaning of respect. Vicky’s conduct at school is just as unrespectful; she’s even more offensive and mocking towards her classmates. To correct Vicky’s conduct, Petra makes an ingenious plan to teach Vicky a lesson on humility.
Three classmates with special powers, Nora, Ester and Carmen, form a secret society dedicated to doing good at school. Their goal: denounce all abuse and illegal acts at school. Along their school’s director (Edna Lisboa), they will defeat the reign of terror of Gilbert, alias “El Macho” and his girlfriend Afrodita, alias “La Potra”, who have a gang in the school that sells drugs.