Momo is a young orphan girl who lives in the ruins of an old Roman amphitheater and becomes friends with everybody in the neighborhood. But when a powerful international corporation starts stealing everybody’s time, nobody has any time left for her, let alone their friends or families. Momo, together with Master Hora, the custodian of time, are the only ones who can go up against the time thieves before all is lost forever.

Razzullo is a scrivener hired by the Emperor Augusto to take a census of all the Empire citizens, who is keeping on looking for stratagems which allow him to satisfy his hunger. On his way he runs into Sarchiapone, his looney countryman, barber and violin scraper, on the run because he has cheated a gangster. They handle together many vicissitudes in order to earn some money to buy something to eat. In the meanwhile, Mary and Joseph are travelling looking for a place in which waiting for Baby Jesus' birth, pursued by Plutone, Lord of underworld, and the four little devils in his service.