When the Third Northern War broke out, White Orchard was no exception to the battles and soon the drinking water from the Ismena river became polluted with dead bodies. Unfortunately, Odolan's daughter drank the now contaminated water and became deathly ill. While she could be saved with safe drinking water, the only nearby source was a well in the abandoned town of Hovel, where a noonwraith killed anyone who got too close to the well. Desperate, he put out a contract for anyone to kill the noonwraith so he could access the clean water.
If Geralt helps him and accepts payment: Grateful, Odolan offered the reward he promised.