The Rengoku family's line of vampire hunters, supported by the English crown in the late 19th century, falls to Kyojuro: a man who has pushed his physical and mental abilities beyond human limits.

Despite being humanity's last hope against vampires, he is in love with his main enemy, a powerful female vampire who protects her castle and her people. The two grow inexorably closer despite being mortal enemies. Tension mounts when you detects her scent...