In the late Edo period, a secret ninja named Hayate operates under the shogunate's covert orders, tasked with eliminating evil. The story follows Hayate as he confronts a deranged group of evil ninjas plotting to overthrow Japan. Ordered to assassinate the wicked monk Gokurenbo, Hayate draws his sword on a midnight road to expose the villain's true identity. However, Gokurenbo employs eerie techniques, turning the tables and cornering Hayate instead. A battle of ninja arts and strategy begins here.