A group of aid workers tries to resolve a crisis in an armed conflict zone: Sophie (Mélanie Thierry) is a newcomer, she wants to help; Mambrú (Benicio Del Toro), who has seen it all and wants to go home; Katya (Olga Kurylenko) once wanted Mambrú; Damir (Fedja Stukan) wants the war to end, and "B" (Tim Robbins) doesn't know what he wants. Humor, drama, emotion, routine, danger, hope: it all fits in a perfect day.