Jenaro se hace pasar por el padre de Roberto para que ésta pueda casarse con su novia Luisa. Al conocer a Hermelinda, hermana mayor de Luisa, se enamoran provocando los celos de Espiridión.
Rock-and-roller Arnie Haynes returns to his hometown as a hero to the teenagers. However, the mayor and other concerned adults have banned him from performing in his hometown because they consider him and his music a negative influence on the youth. But with the help of disc jockey/publicist Alan Freed and fellow artists (including Bill Haley and the Comets and Little Richard), they hope to convince everyone that rock and roll is not as dangerous as the adults think.
A frustrated big-band promoter runs in to rock-and-rollers Bill Haley and the Comets at a small-town dance. He quickly becomes their manager and, with the help of Alan Freed, hopes to bring the new sound to the entire country. But will a conniving booking agent, with a personal ax to grind with the manager, conspire to keep the band from making the big time?
