Once upon a time a greedy dog stole a piece of meat from a nearby house and holding it in his mouth, he began to cross the river over a narrow bridge. While doing so he chanced to look down and saw his own shadow reflected in the clear water of the river.
He mistook it for another living dog with a bigger piece of meat. He decided to snatch that away from that dog and thought to make a feast with the two. But while he tried to do that, he dropped down his own piece of meat, which was swiftly carried away by the current of the river. Thus, he lost his own.