Deep within Turkey's Ararat Mountains, a clandestine group called ARCAM has discovered what is thought to be Noah's Ark. The U.S. Machine Corps., a rogue Pentagon faction, seeks to seize the Ark to achieve global dominance. Standing in their path is a unique ARCAM agent known as a Spriggan. Japanese Spriggan Yu Ominae joins forces with French Spriggan Jean-Jacques Mondo to fight against the U.S. Machine Corps., which is commanded by Col. MacDougall—a genetically modified boy possessing lethal psionic abilities. They must move quickly to halt MacDougall before he exploits the Ark for his personal objectives.