The House of Falknor

From publisher blurb:

This is an OSRIC adventure.

Lord Falknor has ruled his domain for decades from an estate on the edge of town. Relatives of his have become concerned that he never seems to age. Despite his advanced years he still competes (and wins) tournaments against much younger men. He still looks as young and handsome as he was when he was in his thirties despite the loss of his wife at a young age.

These concerned relatives have asked that the adventurers visit the estate and spend a weekend there. They are to discretely investigate and find out if there are "unnatural" reasons for Lord Falknor's youthful appearance.