Its debt to Scream and Dario Argento notwithstanding, this witty Spanish horror movie wears its self-referential humour and convoluted plotting lightly. The imposing medieval architecture of Salamanca adds scale, and the unusual mythology surrounding the city's local minstrels lends thematic complexity. In days of yore, poor scholars financed their studies by performing traditional songs, but were later displaced by rich kids doing it just for fun. Now modern-day students at the city's university are being targeted by the Internet, then murdered by a masked killer in a minstrel's distinctive black cape. Fusing modern technology with medieval lore, the film gives familiar generic conventions a clever Spanish twist.