Rome, summer 1943. Four children play war while the bombs of real war explode around them. Italo is the rich son of the Federale, Cosimo has his father in confinement and an ancestral hunger, Vanda is an orphan and a believer, Riccardo comes from a wealthy Jewish family. They are different but they don't know it and between them "the greatest friendship in the world" is born, impermeable to the divisions of history that are covering Europe with blood. But, on October 16, Riccardo is taken away by the Germans together with over a thousand people from the Ghetto. Thanks to Italo's federal father, the three friends think they know where he is and, to honor the "spit pact", they decide to leave secretly to convince the Germans to free their friend. The three children begin to travel in an Italy exhausted by war, among soldiers in disarray, deserters, occupying German troops and starving populations.
The three children are not entirely alone, two adults set off to bring them home: Agnese, a nun from the orphanage where Vanda lives, and Vittorio, Italo's brother. She hates violence as a Christian and he is a fascist war hero: they are different and, unlike children, they know it very well, in fact they fight all the time.
The double journey of children and adults in war-torn Italy will be play and terror, childish poetry and deprivation, discovery of life and risk of death: an experience capable of imprinting its seal on all the characters involved, changing the conscience of individuals and their relationships.