When a genius patissier dies in a tragic accident before achieving his dream of creating the world's greatest sweets, he is reincarnated as nine-year-old Pastry Mille "Pas" Morteln. Now in a medieval world brimming with swords and magic, Pas enjoys a peaceful life in the Fief of Morteln under the authority of his father, the military hero Lord Casserole. However, scarce ingredients render sweets a luxury, so Pas can only dream of baking.

Once news arrives of approaching bandits, Pas must learn magic and fight to defend his land, all to one day create a confectionery paradise!