After I bring the book to the old man I decide to go to Falkreath
I entered to the tavern I eat and rest, then I go out to explore the village
I entered to Jarl´s Longhouse (the guy in front is a monk who fight with fist and he help me in my quests)
And he named me Thane of Falkreath for the reason of help his people
Then I go out and cook some food, I eat and rest
Suddenly a nordic tell me something about his ancestor kin and that he was death and buried in the cemetery, but someone profane his grave but the true is his kin was a vampire he was sleeping and someone waked up him and he went to join their kind, the nordic guy be ashamed of their ancestor because his kin was a vampire so he ask me If I could handle him for an amount of money, so I say yes
So here I'm in a dark cave searching for the vampire