A boy named Jojo Betzler in Hitler's army learns that his mother has secretly hosts a Jewish girl in their home. The girl is staying on the roof of their house. Of course, this situation will lead to a great confusion in Jojo's head, whose imaginary friend is Adolf Hitler. While the naive child tries to find a place in the growing fascist regime, he starts to see that the girl he hates is also a humanbeing, even though he resorts to his imaginary friend who can give advice and help him. Hitler, his imaginary friend, is not exactly what he seems to be. Jojo will have to fight to end this horrible racism.