Master martial artist Masahiro Kai is a shadow of the champion fighter and trainer he once was. After his protégé was slain in a no-holds-barred, underground fight by the incomparable Chang Lee, Kai slips into a numbing alcohol-induced stupor to try to forget the past.

Masaru Aso was the lab assistant of geneticist Doctor Mochizuki, used as one of his experiments related the creation of the Neo Organism, enabling him to transform into a grasshopper-like being called Kamen Rider ZO. He fled into the mountainside and went into a coma before he was awakened by a telepathic call two years later with an unconscious urge to protect Hiroshi Mochizuki, the son of Doctor Mochizuki.

Soon after the break of the pandemic and realizing that his clock is ticking, Kristofer gets the urge to embark on a journey to try to find out what really happened when his Japanese girlfriend mysteriously vanished without a trace from London fifty years earlier.

Documentary of the film Kamen Rider ZO.