For Serbian filmmaker Mila Turajlic, a locked door in her mother's apartment in Belgrade provides the gateway to both her remarkable family history and her country's tumultuous political inheritance.

A locked door inside a Belgrade apartment has kept one family separated from their past for over 70 years. As the filmmaker begins an intimate conversation with her mother, the political fault line running through their home reveals a house and a country haunted by history. The chronicle of a family in Serbia turns into a searing portrait of an activist in times of great turmoil, questioning the responsibility of each generation to fight for their future.