Leo-Pardo Da Vinci is great at everything he does. He's a genius. So when a rich merchant asks him to paint the portrait of his daughter, Mona, he sets to the task with vigor. But how can he paint a portrait of someone who's allergic to everything and is always sneezing? That's why they call her Mona Sneeza. But Leo-Pardo's a genius––and he gets her to stop sneezing and for once... she even smiles.