The people of Hamelin, overrun with rats, offer a bag of gold to anyone who can get rid of the rats. A piper offers to do the job, and successfully lures the rats into a mirage of cheese, which disappears. The citizens, disappointed that all he did was play a tune, offer only pocket change. The piper, angered, plays a new tune that has all the children of the city follow him, even the new twins the stork is preparing to deliver.
