Where does The Witcher: A Grain of Truth fit?

Geralt takes a short cut down a beaten path, where he makes a grim discovery of two corpses. Backtracking their trail, he's led to a derelict mansion secured with elevated walls and a gate—mysterious and ramshackle, yet adorned with a rare elegance Geralt could not ignore. He is met with the mansion's owner—not quite human, but a beast with the faculties of a man. With Geralt unfazed by his monstrous appearance and displays of aggression, the beast invites him inside. A kind but wary host, he shares stories of his family, his life ... and his curse. If the weight of his misdeeds could condemn him to the body of a beast—a retribution spoken of only in fairy tales, could there be another grain of truth in these tales of fantasy—one that could help him elude his fate and lead him to salvation?

Adaptation of the short story from The Last Wish.