In feudal Japan, a band of skilled ninjas led by the brave Yamata encounters an unexpected menace when a fiery object crashes into the forest. Investigating the enigmatic phenomenon, they soon realize they are not dealing with a conventional enemy. Strange, otherworldly creatures with deadly power and agility begin to attack them. Yamata, along with his companions Jinnai and Nezumi, must rely on their training, martial arts skills, and teamwork to survive the relentless onslaught of these ruthless alien beings.

A fierce battle ensues as the ninjas deploy their wits and weapons against the advanced and horrifying capabilities of their extraterrestrial adversaries. Each encounter between the seasoned warriors and the sinister aliens escalates in intensity, uncovering the shocking extent of the creatures' strength and brutality. Yet, amidst the chaos, the true essence of their ninja creed is tested—courage, honor, and resilience. As the struggle drags on, the ninjas fight to protect not only their lives but also their honor and the safety of their land against a menace unlike any they have ever known.