In times of olde, God gave mankind the ten commandments, and a message that has been lost to the centuries. In the present, Koichiro Kamishiro is a modern day Indiana Jones who scours (and often destroys) ruins for hints of the past, until one day he runs across a box filled with two crystal triangles. Having inadvertently run across the key to God's lost message, Kamishiro suddenly has a lot to deal with including assassination attempts by the KGB and the CIA, aliens hell-bent on destroying the Earth and the love of several women!

In Japan, the vampire-hunter Saya, who is a powerful original, is sent by her liaison with the government, David, posed as a teenage student to the Yokota High School on the eve of Halloween to hunt down vampires. Saya asks David to give a new katana to her. Soon she saves the school nurse Makiho Amano from two vampires disguised of classmates and Makiho witnesses her fight against the powerful demon.