Death of a Darklord. Ravenloft The Covenant

In a land where magic is feared, a young mage must betray her own nature by joining the fight against dark sorcery There is a plague in the village of Cortton, a plague of the dead. Corpses walk the streets in search of the living. The villagers send for the mage-finder Jonathan Ambrose, for they believe evil magic is at work. They are right. Jonathan soon discovers who is behind the destruction of the town: Harkon Lukas, a wolfwere who plans to escape the bounds of his realm.
All he needs to enact his scheme is the aid of Jonathan's adopted daughter-a young woman with a talent for magic in a land and family unforgiving of such abilities. Jonathan believes he is in Cortton to save the villagers-to lay the dead to rest. But if the vile shapechanger Harkon escapes his curse and can travel the Dark Domains as he pleases, the slaughter has only just begun.