Set against the backdrop of the French Revolution in 1792, the series follows Richter Belmont, a descendant of the legendary Belmont family of vampire hunters. Amidst societal upheaval and terror, Richter fights to protect the innocent and honor his family's legacy while confronting dark forces and an apocalyptic threat from an ancient vampire known as the Vampire Messiah. Along the way, he allies with a diverse group of magic-wielders and revolutionaries, including the young sorceress Annette and the African-French vampire hunter Maria Renard, as they uncover a conspiracy to plunge the world into eternal night.