In 1986, Gerardo returns to Rosario after a long absence. He has returned to meet his seven-year-old son, David, recently recovered by his maternal grandmother. This melancholic and introverted boy is just beginning to know his true family. Father and son will gradually discover each other, and each in their own way will seek a bond. The depth of their feelings must overcome the mistrust and pain caused by their absent mother and wife.

A hitman working for Lieutenant Crinal, a corrupt local police officer. The lives of these two characters become complicated when a famous '60s diva returns to the quiet town and mistakes Roberto for a chauffeur. Their lives become inexorably intertwined in a journey against time and death.

Evocative and lyrical, On Each Side follows the interconnected lives of several characters who are affected by the building of the Rosario-Victoria Bridge in Argentina - a gargantuan, modern undertaking that links two Argentinean cities. On Each Side is the story of a bridge that not only traverses a river but spans the traditional and the modern, the past and the future.