The Story of the Film which is inspired from tha Korean Film Kidnapped! The Screenplay matters! Good One. Not a Single bit of Boring Scenes. The opening scene is creepy and disturbing, with visuals somehow reminiscent of "Timecrimes". While the two films are worlds apart, this just sets the tone for how disturbing everything will be. And "disturbing" is the operative word, as home invasion is the most disturbing horror subgenre because of its realism.
A successful home invasion film feels real, feels like something that could really happen to any of us at any time. It is not a killer in the woods or an alien, but real criminals that can beat, kill or rape us on a whim. Such situations are rare (thankfully), but all too possible. This is, by the way, a successful one, right up there with the best (such as "Funny Games").
The biggest complaint is that there is some poor dubbing at times, especially on the daughter. But if the film is watched in Spanish with subtitles, such a nuisance can be avoided.