Hamelin was a beautiful town on the banks of river Weser. But the town was full of rats. And they were destroying everything - clothes, books, food etc.
Mayor announced prize for anyone who can save the town from the rats. A man who introduced himself as Pied Piper came to Mayor.
I'll get rid of rats. But I need 1000guiders.
But, I think, we can settle for 500 guiders.
Pied Piper played a tune with his pipe. And all the rats in the town started following him. He took the rats to the river Weser. All the rats were drowned in the water.
The Mayor backed out from the promised deal.
I have done what I promised. Give me the promised fees.
Angry & Upset Pied Piper, played another tune. This time all the children of the town started following him. He took them to a cave outside the town. Putting the children inside the cave, he closed it.
The Mayor realized his blunder. He begged forgiveness to the Pied Piper and paid double the fees. Pied Piper brought back the children. Everybody in the Hamelin lived happily thereafter.