A successful Spanish executive from a telecommunications company working in Argentina is about to face the most important week of his life, but all his plans will be sabotaged by an eccentric character who will make his week a living hell…

The quiet day-to-day existence of two kidnappers, Alfonso and Marta, comes to an abrupt end when the elderly businessman they are holding in captivity tries to commit suicide.

After getting into a minor traffic accident, Pablo attempts to make light of the situation by asking the driver of the other car, Sonsoles, out on a date. When she refuses and instead files an injury report, Pablo snaps and begins stalking her. He soon discovers that Sonsoles has a beautiful teenage sister, Maria, with whom Pablo is immediately infatuated -- a lust that soon turns dark. Can Pablo control his obsession, or will it consume him?

There's nothing more terrifying than be afraid in your own house, in your room, in a place where you have spent great part of your life but...what are you afraid of?