Teh Iron Cross Army has developed an extra strong laser and attached it
to one of their Machine Bems (~ robots), Kabuton, which is a crossbreed of
robot and insect and can therefore shrink to insect size.
Why does the
Iron Cross Army need an insect-sized Machine Bem?
Because they want it
to follow around Shinko (Izumi Oyama), who works for professor Sunamura
who has developed a meteorite detection device that would expose the
headquarters of the Iron Cross Army. Once in the professor's lab, Kabuton
grows to human size and tries to kill those present and steal the plans
for the device, but Shinko just happens to be Takuya's (Sinji Todou)
sister, and Takuya just happens to be Spider-Man, secretly, and in his
secret superhero identity he saves not only his sister and the professor
but also manages to defeat Kabuton, using a mirror against his laserbeam
and this way injuring him.
Kabuton is forced by Amazoness (Yukie
Kagawa), second-in-command of the Iron Cross Army, to continue following
Shinko around in his insect form despite his injury, but once Shinko finds
the injured insect, she - not knowing that it really is the Machine Bem
who attacked her - nurses it back to health and uses it as a sort of
fashion accessory - the latest fad from Europe - as well. And when she
finally frees Kabuton, it has fallen in love with her.
Not happy the way
things have turned out, Amazoness orders Kabuton to kill Shinko and the
professor, but before he attacks her, he exchanges the fake diamond she
wears around her neck for the real one that fuels his laser beam, thus
rendering his own all-powerful laser cannon useless.
In the final
conflict, while Spider-Man engages in hand-on-hand battle with Kabuton,
Amazoness tries to shoot Shinko using her ray-gun, but Shinko's diamond
deflects her rays and chases her away. Ultimately, Kabuton grows to giant
size, and Spider-Man calls his giant robot Marveller/Leopardon to defeat
and destroy it, which is not a hard task because without its laser beam,
Kabuton is pretty useless.
A half-robot/half-insect falling in
love with a human woman - that's an idea that's pretty outlandish and also
pretty inspired ... in a childish and slightly silly way of course. But
then again, isn't this show so (unintentionally) enjoyable because it's
childish and silly?