Das wunder von berlin (2008)

East Germany, 1988: working as a state security service agent, Jürgen Kaiser is loyal to the party line, but worried about his son Marco, a punk. As he is arrested after a concert, Marco is forced to join the army, where he surprisingly identifies with socialism and believes he has to defend his country against the capitalist enemy. While Jürgen is astonished, his wife Hanna and Marco's girlfriend Anja, supporting the civil rights movement, don't like his new attitude...