In town, blood-sucking incidents are growing frequent. As Kitaro investigates, he receives a letter. The sender wants to be killed. Kitaro goes to visit the sender and meets Onozaki, a genetics researcher. Onozaki has created immortal cells and conducted an experiment where he injected himself with them. As a result, he has obtained an immortal body and also turned into a youkai. When he transformed into a youkai, he lost control and went seeking blood. All the recent blood-sucking incidents were Onozaki's doing. Because of the immortal cells, Onozaki can't kill himself, so he begs Kitaro to kill him, but...
And I finally succeeded in creating
an immortal cell.
.ونجحت أخيرًا في خلق خليّة خالدة
Und schließlich gelang es mir,
eine unsterbliche Zelle zu züchten.
Y logré crear células inmortales.
Y logré crear células inmortales.
Et je suis finalement parvenu
à créer une cellule immortelle.
E alla fine ho ideato una cellula immortale.
E finalmente tive sucesso
em criar uma célula imortal.
И, в конце концов, одержал успех, 
создав бессмертную клетку.