In the 15th century, in a poor Italian village, the monks of a modest convent take up an abandoned baby. Unfortunately, for all their efforts, they prove unable to trace his parents. So they set up providing tender loving care to the little boy. Marcellino lives a happy life among the men of God but, as he grows up, he misses his mother more and more.

A touching story of an Italian book seller of Jewish ancestry who lives in his own little fairy tale. His creative and happy life would come to an abrupt halt when his entire family is deported to a concentration camp during World War II. While locked up he tries to convince his son that the whole thing is just a game.