From the PDF:
Sir Jaan d’Vontur is the stodgy old owner of Castle d’Vontur, a three story tower that has been family owned for generations. The old knight’s cruel rule over the surrounding lands has both angered local merchants and villagers as well as left him unmarried and without offspring.
Several wealthy merchants have hired the adventurer to kill the old knight. The adventurer must carefully infiltrate the tower, avoid the servants and guards and get to Jaan.
For one player and a game master. Billed as "difficult".