After being rescued from nearly drowning in a river, Chidori, a skilled ninja despite her innocent looks, feels a deep-seated desire to repay her savior's kindness. Years pass, and she and her friend Sukezou find themselves serving under their rescuer - the ambitious warlord, Nobunaga Oda. As Nobunaga wages battles against foreign invaders and covets lands nearby, Chidori receives crucial assignments to ensure success, be it gathering intelligence or executing key figures. Amidst her duties, she also interacts with Nobunaga's eclectic circle of relatives and employees, all the while striving to lead her lord towards excellence.