Football captain Cristóbal discovers that his neighbor and classmate, Mariana, has changed a lot over the summer. Meanwhile, Luli is still as vain as ever and overshadows her poor brother, Fernando. As a new year begins at High School Mexico (HSM, initially interpreted), the school has announced a "Battle of the Bands" contest hosted by Jesse & Joy. Working against the clock and with limited resources, Cristobal, Mariana, and a few of their peers unite as a band. In a desperate effort, Luli dares the impossible task of separating Cristobal from his friends. But only one band will be the winner; the one who understands that teamwork, personal development, and hard work will not only make them better artists but also better people.
Cristóbal
Mariana
Luli

Fer
Juan Carlos

Fabiola
Jorge

Stephie
Cesar
Pauli
Caro
Cristóbal's Father

Mariana's Mother

Luli and Fer's Mother

Luli and Fer's Father

Director Mr. Guerrero

Angelina

Joy

Jesse

Marifer
Rogers