Seville, Spain. Juan Santos, a convicted petty criminal, gets out of jail for a day to celebrate with Triana, his wife, the first communion of their daughter Estrella.
During the last years of Pinochet's military regime, a group of militants from the "Manuel Rodríguez Patriotic Front" plan a prison break of political prisoners, through a tunnel that will take them 18 months to dig.
After being falsely accused of a terrible crime, Hector, a man with a neurological disability, goes to a secret prison. His goodness conquers the prisoners, who plan to prove their innocence.
Uruguay, 1973. Having been crushed by the military dictatorship, surviving members of the Tupamaro guerillas are imprisoned and tortured. They must find a way to endure the coming 12 years.