Baia, Siberia, Russia, is a small town outside the city Omsk with a large dhampir community with some intermingling humans. This is a place that the rest of the vampire world would call a "Blood whore Commune." This is the hometown of Dimitri Belikov, and where the rest of his family currently live.
In Blood Promise, Rosemarie Hathaway travels here with an unwilling Sydney Sage in her attempts to find and kill Dimitri Belikov in his Strigoi state. While Rose stays with his family, she becomes very close to Olena Belikova, Dimitri's mother, and Viktoria Belikova, Dimitri's younger sister.