Riccardino has been separated for four years from his mother, a woman with strong personality disorders. Despite the thoughtful and attentive guidance of his educator, who wants to lead him towards a safe future in the family home, Riccardino decides to run away, join his mother and live with her.

A clash between fishermen and poachers is surging on the Po river Delta. A local group of volunteers lead by Osso wants to save the river from overfishing and defend it from the Florians, a family on the run from the Danube region. They have with them Elia, who once was part of the local community and now is on the opposite side of the conflict. Overtaken by blind violence and thirst for vengeance, Elia and Osso will confront each other in the Delta fogs, discovering their real nature in a fight that has no heroes.