It's 1939. The ebullient, playful Guido comes to town. He works as a waiter under the watchful eye of his uncle, an elegant man who is a Jew. Guido falls for Dora, a schoolteacher, whom he calls "princess" and courts by popping up at unexpected times. She dumps her fiancé to choose Guido. The film jumps ahead to the war's last months. Nora and Guido have a child, Giosué, and when Guido and the lad are shipped to a concentration camp, Dora voluntarily follows. Although the men and women in the camp are separated and a child is in mortal peril, Guido finds ways to communicate with Dora, to hide Giosué, and to convince the boy this is an elaborate game, a special contest to win a tank.