Throughout the Bosnian War, a vital link, a tunnel underneath Sarajevo Airport, kept hope alive for the 400,000 besieged inhabitants of the city.
This documentary tells the story of the tunnel, talking to those who built it, used it and now remember it.
By early 1993, when the Bosnian military gave the order to dig the tunnel, food and fuel had all but run out and the only way in or out of the city was across the UN-controlled airport runway - fully exposed to Serb snipers.
Most important of all - the tunnel became a way of bypassing the arms embargo on Bosnia, bringing in weapons for the city's fighters.
Those who made the journey included doctors, the Sarajevo Football Club, politicians and black marketeers.