While this intelligent Spanish slasher gleefully sloshes on the high-tension splatter, it also delights in inverting generic tropes, dishing up a lip-smacking level of moral complexity.

There’s an atmospheric, unsavoury oiliness to the cinematography and an uncomfortable tussle of sympathies – director Carlota Pereda shows real promise as a genre film-maker.

Piggy presumably aims to test our sympathies, but just forfeits them entirely, in the service of a facile plot and a heroine even the film itself can’t seem to stand.

A brutal and shocking horror with a fantastic lead performance from Laura Galàn that saves the film from its narrative bloat.