One day, Kenichi meets Yuri, a foreign girl who is being chased by someone. In front of Hattori-kun and the Perman team, a mysterious masked monster named Psychoman, who can also levitate, appears. Psychoman, who plans to use his supernatural powers to conquer the world, forms an esper army of his own kind...

Hattori-kun received a letter from Iga's father asking him to take his friends and return home for spring break. Hattori-kun leaves for Iga with his younger brothers Shinzo, Kenichi, Yumeko-chan, and others. However, a suspicious shadow stares at the group... He is a subordinate of the scientific ninja Mechamaro, who has replaced the power of ninjutsu with the power of science. Mechamaro was plotting to confront Hattori-kun in order to prove the strength of scientific ninjas. And in order to occupy Iga no Sato, Hattori-kun sends a fake letter...

"Their dark power is supreme. Their evil empire is vast. They are the Bozanians. And they have blasted their way across the galaxy for war on earth and to make the human race submit to their rule! But an elite band of five valiant children stand against them-the VOLTUS 5 team! For they can transform their 5 spaceships into a mighty, gigantic robot capable of withstanding any force. But can they defend the earth from the Bozanians' monstrous evil?!" - US VHS Back Cover . A compilation film of five episodes (1-3,9,18) that was dubbed by Frontier Enterprises . The film was commissioned to Toei by the Filipino film distributor "UNIPROM FILMS". Based on the Filipino English dub from 1978, with character names that reflect that version.