Crystal Triangle

Koichiro Kamishiro is an assistant professor at a university who is highly regarded in the field of archaeology and travels around the world to find various antiquities as well as the "Message of God" which relates to the mysterious Hih Tribe. One day while investigating the ruins in the Middle East, he finds a strange cube-shaped stone despite running into several problems. While investigating the mysterious stone, he receives a visit from Miyabi Koto, the daughter of his former teacher. Initially, Kamishiro is not too keen on the idea, but after listening to Miyabi's story, he decides that it is well worth investigating and gets involved. However, he was unaware that this would lead to a major revelation involving the "Ten Commandments", a book of divine prophecy. As he along with Isao, Mina, Ginji, and Miyabi travel across Japan repeatedly running into the Japanese government, CIA, KGB, and even messengers of the Ten Commandments who will stop at no cost to get the Crystal Triangle back, he comes to a realization that the Crystal Triangle may contain the Message of God he was looking for, which is the potential 11th commandment that will prevent the Earth's destruction.