Moonshadow's future as agent of the Grey Light Order hangs in the balance when he receives his first mission--to steal the plans for a secret weapon developed by a power-hungry warlord who is threatening to use the device to plunge medieval Japan into civil war.
A power-hungry warlord threatens to use a secret weapon to plunge the nation into war, and Moonshadow, the youngest agent, has been assigned the task of stealing the plans for the weapon.