A dragon was living under Wawel Hill in Krakow and stealing young girls and farm animals. Prince Krak offered half his kingdom and his daughter's hand in marriage to whoever could kill the dragon. Many soldiers tried but failed. Finally, a shoemaker filled a sheep's skin with sulphur and left it near the dragon's cave. The dragon ate the sheep and its stomach started burning from the sulphur. It ran to the river to drink but continued drinking until it exploded. The shoemaker received the prize from the prince and married his daughter, saving the city from the dragon.