In a world dominated by progress and technology, over-strained teachers and students being taught by headphones only, schoolgirl Ljuba is trying to escape by dreaming of an angel that might change something. The glorious singing angel Klarina appears in the bathroom mirror of her bizarre cardboard school and inspires her music teacher Engelbert to compose a master piece of music to bring back joy and happiness to people's life. This mission causes absolute chaos in school and drives everybody insane. While almost loosing his mind Engelbert is being invited by the angel to pass the mirror for a quick look into paradise. He is now forced to withstand an incredible trip through Heaven and Hell and to finally face the truth about the "real" world behind the mirror.