All of the world is an adventure, and Aunt Queen, as she likes people to call her, has experienced alot of it. Old age has confined her to her home, and curio shop where she collects and sells cameos, books, and antiques.
A plague has hit the local area.
In humans it affects only the most vulnerable, the children and the very old, and even than it's little more than a summer cold. 24 hours of sniffles and then it's gone, barely noticeable really.
To sheep however it is fatal and the whole economy of the area is in serious trouble. If this keeps up the area could well be facing famine.
Somebody (enter the PCs) must find the rare herbs needed to make a cure.