Okay, this movie is a lot of fun and, even though it has some gruesome moments, it is easily Tsukamoto's most light toned film. I guess you could say it's kind of like a 'Wizard of Oz' for cyberpunks. The fact that it was filmed in Super 8 doesn't detract from its appeal as the settings and visual effects are all very, VERY well done.
SPOILERS! If you like your movies fresh, stop reading NOW.
The story line, as told elsewhere in these comments, deals with the Electric Rod Boy and Momo versus a group of Vampire thugs in a future hell scenario (where he also meets a future version of himself). Now, IIRC (it's been about five years since I saw it), the Vampire Gang have a giant machine that they are using to slowly obscure the sun so, when it is fully blacked out, they can rule Earth. In order for the machine to work it needs a virgin (which they get) as a battery!!! Unfortunately for the Vampire Gang one of the higher ups can't control himself and sucks her blood thereby poisoning their doomsday machine! Just thought I'd add those little plot points to what's already been written.
Review by marshottentot from the Internet Movie Database.