After a period of sorrow, Fernando de Arellano, a rich businessman who has recently lost his young wife Blanca from a serious ilness, meets Mónica, who looks identical to her.
A crime writer searching for the truth about a personal tragedy becomes involved in a murder investigation.
The Peralta brothers work in the countryside the Alto Paraná. There they will meet subhuman working conditions. Finally, the workers rise and harshly punish their exploiters.