The secret warriors of feudal Japan were the ninja. Sent on impossible missions, the ninja were trained to work in shadows, gather information and defeat the enemy to build a world of peace. Akakage (Red Shadow), Aokage (Blue Shadow), and Asuka are rookie ninjas under the tutelage of Shirokage (White Shadow). Their life is a series of perilous missions that entail intrigue, deception and intimidation.