Franco Montero, an administrative detective, gets the unexpected obligation of the custody of his half-brother, Lorenzo Montero, who has an IQ of 200, and changes the way of life and work of the detective.

With dreams of a better life, a humble but illiterate labourer and his wife leave their poor village in Santiago to move to Buenos Aires. However, a sinister boss' promise of a bright future will come at a high price.