Enredo

Enrique is a gym teacher who along with his sister want to start a musical career with the support of their grandfather, a great scientist who wants to stop an evil despot from getting an artifact that would endanger the entire world.

Enrique is a P.E. teacher at a high school, who's sacked because his classes are fun and games with music, and the schoolmaster dislikes them. He drives to live with his grandfather (Luis Escobar, La Escopeta Nacional), to find that his 10-year-old sister Ana, a student, eloped with him, unwilling to stay there. En route, they find a children's music band, the Coconuts (featuring a young Achero mañas) and they decide to start a professional career in music. The grandfather supports them, as long as they also study; he hires a governess, Castañeta (Amparo Soler Leal, La Gran Familia). The grandfather happens to be some kind of very advanced scientist living in a castle with a team of people working for him, including a speaking (and whining) computer Omicrón and a stereotypical scout (José Lifante, The Adventures of Baron Munchausen, Tiempos Duros Para Drácula). The grandfather is confronting Barón Von Nekruch (Agustín González, Belle Époque), a green-skinned immoral scientist with (low-budget) alien-looking minions who wants to steal valuable discoveries from the grandfather that will help in his evil plan. Two of Von Nekruch's clumsy spies, (Guillermo Montesinos, "La Vaquilla" and Emilio Mellado) repeatedly and comically fail in their attempts - until they plan a way to blackmail the grandfather by kidnapping by-then-successful Enrique and Ana.—Farlstendoiro

Enrique is a gym teacher at his sister Ana's school who refuses to follow the school's rigid segregation of male and females practicing the same sports. Enrique is fired and he decides to start a musical career with the help of their grandfather and Ana secretly tags along. On the road to their grandfather's house they meet a children's band named "Coconuts" who ask the pair to join them in a music competition and they accept. Enrique and Ana's grandfather is a very smart scientist in the brink of a great discovery, and he is always spied by an evil ruler named Baron Von Nekruch whose sole desire is to posses a power so great he will be worshiped by the entire world. Enrique and Ana's musical career starts to take flight while their grandfather tries to protect the world from Von Nekruch who will go as far as to threaten the kid's lives unless the grandfather gives him a powerful weapon he is hiding.