After a fifteen-year exile, Thomas come back home to bury his father, a Republican fighter thrown in jail by Franco's regime who died without ever regaining his freedom.
In 1976, Argentina fell into the hands of a de facto government. Thousands of citizens are persecuted and kidnapped. This is the case of the parents of two children, who, knowing they are wanted, decide to hide.
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.