Barovia.

Intro Absalom the God and creator of vampires, had stolen the youngest child of the Van Helsing house, William Frederick Van Helsing at 6 years old. As retribution towards the family, for all of her children's blood that stained their hands. Absalom had gotten rid of the child's memories and turned him into a Vampire, she had given the child over to Strahd von Zarovich, so the count could raise William as his own. William Birdstone von Zarovich Is now 43 and is very loyal to his adopted father considering him to be his true family.