Two sides of a story in one book. The clever reporter Phanis the Owl is determined to solve yet another mystery, perhaps the greatest of our childhood, and he must do it in just one night! What is going on with this Santa Claus? Does he exist or not? And if he does exist, how does one person, even with flying reindeer, manage to deliver presents to all the children of the planet in one night? And how, being so chubby, does he fit down the chimney? And the other thing? How does he know who is good and who is not? Christmas Eve has arrived, and Phanis will not let it pass like this! We must finally learn the truth. After the successful books of the Fairy Tales... otherwise! Little Red Riding Hood, Chickpea Tiny and Once Upon a Time there was Cinderella, which were so loved by children, Marina Gioti embarks on an adventure at the heart of Christmas. So what do we tell our children when they ask us about Santa Claus? Because time has twists, but so do coins have two sides...