Palace of the Vampire Queen: Castle Blood

From the publishers blurb: The story of the Vampire Queen is as enigmatic as the woman herself. Her palace, the dungeons beneath a ruined castle beckon those who would seek to end her reign of terror. But before the dungeons can be entered, the Castle Blood must be cleansed. Palace of the Vampire Queen: Castle Blood is an adventure for first level characters that are destined to meet the most powerful vampire under the crescent moon.