ヒューマンSの効能でトッペイの母は純粋な人間になった。トッペイはこの薬があれば、バンパイヤ族は差別も偏見も受けない人間に生まれ変われると喜んだ。だが自分は熱海博士が作り上げた原人たちと戦わなければならない。だからまだ完全な人間に戻るわけにはいかないとトッペイは思う。列車転覆事故に原人がかかわっていると知ったチッペイは、その首謀者の男が放つ匂いでそれがロックだと見抜き、トッペイに知らせる。
Toppei's mother becomes a full human being thanks to the efficacy of Human S. Toppei is delighted at the thought that this drug will give the vampires a different life as human beings, a life totally free from discrimination or prejudice. But he is convinced that he cannot become a man until he fights against the primitive savages created by Professor Atami. After finding out that the savages are involved in an accident in which a train rolls over, Chippei senses that the leader is Rock by the smell he emits, and lets Toppei know.
