In the year 1930, vampires have infiltrated Tokyo to feast upon its unsuspecting citizens. As the number of victims continues to rise, the citys authorities decide to hire the Jaegers—a strange, diverse group of individuals tasked by the V Shipping Company to hunt down vampires around the world. Carrying musical instrument cases to disguise their identity, the Jaegers battle the vampires with the same mercilessness demonstrated by their foes.