Will love compromise one man's devotion to heavy rock? That's the all-important question behind this broad comedy from Spain. Isi (Santiago Segura) and Disi (Florentino Fernandez) are two best friends who live in a lower middle-class neighborhood near Madrid. Isi and Disi aren't especially bright, but their devotion to heavy metal is complete and unquestioned, and they wouldn't be caught dead listening to a lame pop singer like, say , Joaquin Sabina. However, one day Isi sees Vane (Jaydy Michel), a beautiful girl who attends a nearby college, and immediately falls head over heels in love.

Isi and Disi, the more thugs Leganés heavys return. This time Disi falls in love for the sexy Angie, former rock singer and girlfriend of a big shot record, Berdún. After being recognized as the most brutal band in the equally brutal contest presented by Angie, Disi not only have to save his group Ratamuerta, his friendship with Isi, and the temple of rock "The Kampana of Hell", but also rescue Angie from the clutches of machiavellian Berdún. Once again, rock triumph over evil ...

A popular and beautiful politician plans to expose the evil-doings of a multinational corporation. Hoping to silence her, the corporation's top executives decide to hire the most incompetent detective they can find to act as her bodyguard.