With his big heart, three eager companions and an old mill teeming with incredible inventions, Calimero sets off on wild adventures to put right all those things in life that are just not fair.

Ten stories, full of life and humor, highlight the moral and interior needs of the "ten words" that God gave to man. The protagonists are five children, the goat Yobel and Fra Jacopone, an extraordinary friar who knows how to lead, with intelligence and wit, the children to discover in everyday facts the deepest meaning of the Decalogue, which is summarized in the one commandment of love.