Zapa is a regular, hard-working, 35-year-old locksmith living in rural Argentina. When his boss asks him to do a special job for some special clients, Zapa agrees, for he has no choice. He ends up having to crack the safe at a store so the clients can stuff their bags and carry out a robbery.
To avoid prison, he is forced to leave his family and birthplace for Buenos Aires, where he signs up to become a police cadet. After months of grueling training, he graduates the academy with flying colors; and by doing so, Zapa officially becomes a Bonaerense--a member of the most brutal and corrupt police force in Argentina.
Now he has the power, and now he makes the rules. From this point forward, there's no going back.