If the shoemaker Prokop did not know how to sew such wonderful shoes, he would hardly have met a mysterious girl named Serpentia. Prokop is about to marry his Verunka, but the mysterious Serpentia charms him and when she invites him to the ball, the young man cannot resist. Intoxicated by her beauty, he moves the unknown girl into his home. However, Prokop's mother is not at all enthusiastic about this bride. The biggest mystery for her is where Serpentia goes at noon. However, when her son suddenly disappears, the mother sets out into the world to free him from the power of the mysterious beauty...