This is clearly the work of a novice on a tiny budget. The scripting is weak and the characters poorly developed. Nevertheless despite this it manages to convey some points, which, with more resources available would doubtless be developed in an interesting direction. Others have covered the plot line,but what the film does portray is a bleak modern urban environment with the bourgeois families ensconced in their fortress, terrified of the outside world. They are atomised and have no social cohesion. Each family and also each individual within the family is isolated and paranoid. At the smallest fear, they turn on each other. The police officer who tries to be decent and do his job, is subverted by the endemic corruption of the force and reverts to brutality, turning his guilt and self-hate against the desperate mother. At the end we have poor Alejandro whose basic human instincts have survived, helpless in the face of an uncaring brutalised society. A bleak film to be sure; no one is saved, but it's probably better for that. You are left to think 'How could this be changed?'
Review of The Zone
