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...
It's a birthday present for your dad?
إنّها هدية عيد ميلاد لوالدك؟
Das ist also ein Geburtstagsgeschenk
für deinen Vater?
Es un regalo de cumpleaños 
para tu papá, ¿no?
Es un regalo de cumpleaños
para tu padre, ¿no?
C’est le cadeau d’anniversaire
de ton papa ?
È un regalo di compleanno per tuo padre.
É um presente de aniversário do seu pai?
Подарок отцу на день рождения?