The war between the Iga and Sanada ninja clans is heating up, and a prominent gunsmith is on both clan's radar. Shinsuke Kakei, the gunsmith, is essentially a pacifist, but believes his weapons can bring peace to the land if put in the hands of the right group. Kasumi is sent to convince Kakei to come and work for them, and keep the guns out of the hands of the Iga. Of course Hattori, along with his sister Sayuri, have other plans for Kakei and his wife.

A special retrospective of the two franchises, with segments making comparisons between the different characters, their weapons, powers and so forth. The final segment of the special is the short film "Super Battle: Ultraman vs Kamen Rider" The main characters, Ultraman and Kamen Rider 1 appear on the scene separately, each fighting an original kaijin and kaiju. When the two monsters are nearly defeated, they merge into a more powerful kaiju. Ultraman experiences trouble and calls for Kamen Rider 1's help. Kamen Rider 1 is then able to grow to enormous size to fight alongside Ultraman.