Grumpy witnesses an attempted beating of a Donkey mare and her foal by new trouble makers. Skintops, Pony Purists, who believe that the Edict of Equality only applies to True Ponies.
The Ponyville sewer workers have a problem too. Their sewers are infested with something potentially dangerous.
Grumpy finds a solution to both issues.
Well.. that's one way to kill two birds with one spell.....