熱海博士の開発した『マッドパー』は人間を原子時代の原人に逆行させてしまう薬だったが、別府博士の『ヒューマンS』はこの原人たちをももとの人間に戻す効力があるとわかった。それを知った熱海博士は、さらに強力な原人を作り上げるためプロレスラーを誘拐し、強力な殺人マシンへと生まれ変わらせた。
While "Mad PA," developed by Professor Atami, is a drug that turns men into primitive savages, Professor Beppu's "Human S" is proven to have the opposite affect of making primitive such into modern humans. Discovering this, Professor Atami abducts a professional wrestler to create an even tougher savage, and turns him into a mighty killing machine.
