Objective

Cure Parriwimple of his lycanthropy, ideally before the next full moon on the night of Neyavr 8.

What the Party knows

Parriwimple was bitten by a werewolf (aur naur) back in Session 8 (on Neyavr 1) and has almost certainly contracted lycanthropy, but you won’t know for sure until the next full moon (Neyavr 8).
According to A Study of the Werewolf’s Curse (obtained from Arturi in Session 6), Parriwimple will be forcibly transformed into a werewolf on the night of the next full moon, regardless of whether he resists the curse’s influence.
Father Lucian admitted that the removal of such a curse is beyond his powers, but that The Abbot at the Abbey of St. Markovia in Krezk is known to wield extremely powerful healing magics.
There might be other remedies which could lessen the effects of the transformation.