In order to pay back a debt, the fox had to invite the stork over the dinner, even though he did not really want to.
He made a tasty soup, but he served it up in a very shallow dish and the stork's long beak could hardly reach to get hold of any of it.
Like a true lady, the stork did not complain and even invited the fox to dinner with her. The stork in her turn cooked a delicious meal, but she served it in a tall narrow goblet that the fox could not even get his nose into. So he did not get anything to eat.
"If you play dirty tricks on people, then you must expect to have them played on you as well."