Deep in the Ararat Mountains of Turkey, the secret organization ARCAM has discovered what is believed to be Noah’s Ark. However, the U.S. Machine Corps, a rogue organization within the Pentagon, seeks to seize the Ark as a means of achieving global dominance. Only an ARCAM operative known as a Spriggan can stand in their way. Japanese Spriggan Yu Ominae teams up with French Spriggan Jean‑Jacques Mondo to confront members of the U.S. Machine Corps, led by Colonel MacDougall, a genetically enhanced boy with deadly psionic powers. Together they must act quickly to prevent MacDougall from using the Ark for his own agenda.