At the Belgrade army hospital, casualties of Bosnian civil war are treated. In the hospital they remember their youth and the war. Two young boys, Halil, a Muslim, and Milan, a Serb, have grown up together near a deserted tunnel linking the Yugoslav cities of Belgrade and Zagreb. They never dare go inside, as they believe an ogre resides there. Twelve years later, during the Bosnian civil war, Milan, who is trapped in the tunnel with his troop, and Halil, find themselves on opposing sides, fatefully heading toward confrontation.