The Pied Piper of Hamelin
Hamelin Town is flooded with rats and the Mayor announces Ten Thousand Gold coins as a reward to those who dispose all the rats from the town. The Pied Piper played his flute and all the rats follow his tune right into the river. The greedy Mayor refuses to reward him. The Piper teaches him a lesson. Moral of the Story - Dishonesty of any kind leaves a blemish.