In the Ararat Mountains of Turkey, a secret group called ARCAM has uncovered what is believed to be the fabled Noah's Ark. Unfortunately, the US Machine Corps - a rogue faction within the Pentagon - wants to seize control of the Ark to gain global power. Only a determined ARCAM agent, a Spriggan, can foil them. Japanese Spriggan Yu Ominae teams up with French Spriggan Jean-Jacques Mondo to fight the US Machine Corps, led by Col. MacDougall, a genetically-enhanced young man with dangerous psionic abilities. They must move fast to stop MacDougall from exploiting the Ark for his own purposes.